CLDC-3382 Add support user functionality to merge organisations (#2566)

* CLDC-2093 Merge organisations page - view all merge requests (#2561) * CLDC-3585 Update absorbing organisation question (#2564) * Update user permissions and absorbing org question order * Update absorbing organisation question and routing * CLDC 2094: View a merge request (#2565) * CLDC-3584 Update merging orgs question (#2567) * Update merging organisations question * Update rebase tests * Update routing between CYA and questions * CLDC-3586 Update merge date merge request question (#2571) * Remove unused paths and update merge date * lint * Create delete merge request functionality (#2568) * CLDC-3588: Add helpdesk ticket question (#2572) * Merge request fixes (#2578) * Add cancel button to merging orgs and update merging orgs selection * Update submit button text * Update back buttons * CLDC-2101 Add begin merge (#2575) * Calculate merge request status * Add start merge and merge request job * Update merge request when it gets processed * Refactor and display a banner for failed requests * update test * Update change links * Update copy for error message (#2583) * Do not display cancel button if there's no submit (#2584) * Update hint date (#2588) * CLDC-2100++ Add success notification after delete (#2589) * Update helpdesk_ticket.html.erb * CLDC-2094++ Merge details page adjustments (#2593) * Change page name and hide buttons during processing status * Update test * Make merge request status dynamic (#2592) * Make merge request status dynamic * Update tests * Keep check answers referrer when validation is hit (#2594) * Keep check answers referrer when validation is hit * Remove absorbing org from merging organisations list * Update text to handle singular merge requests * Add merge start confirmation page (#2601) * Set merge request as non processing if it fails (#2598) * Set merge request to no longer processing if it fails * clear last_failed_attempt as soon as we start processing the merge * CLDC-3603 View merged users outcomes (#2602) * Update user outcomes view link * Add user outcomes page * Set user outcomes before merge and on merge fail * Update hardcoded total user count * Account for singular user numbers * CLDC-3603 View scheme outcomes (#2604) * Update scheme outcomes view link * Add scheme outcomes page * Update scheme outcome before merge and on merge fail * Update back links in merge outcomes pages (#2611) * CLDC-3605 View relationships page (#2606) * CLDC-3609 Add existing absorbing organisation merge request question (#2600) * Add existing absorbing organisation page and field * Update status calculation and add new question to check answers * Call correct merge service flow * Update test * Update test * Return correct status when existing_absorbing_organisation is false (#2617) * Change styling of relationship outcomes page (#2619) * CLDC-3604 View logs outcomes (#2618) * Update view logs outcomes link * Add logs outcomes page * Set logs outcome before merge and on merge fail * Update logs outcomes text * Update line break * Fix incorrect filtering of relationships and count * Fix test * Fix test * Fix test * Make example date depend on collection year (#2620) --------- Co-authored-by: Manny Dinssa <44172848+Dinssa@users.noreply.github.com>
5 months ago · e69ed94513
58 changed files with 2573 additions and 721 deletions
--- a/app/controllers/merge_requests_controller.rb
+++ b/app/controllers/merge_requests_controller.rb
@ -1,66 +1,77 @@
 class MergeRequestsController < ApplicationController
-  before_action :find_resource, only: %i[
-    update
-    organisations
-    update_organisations
-    remove_merging_organisation
-    absorbing_organisation
-    confirm_telephone_number
-    new_organisation_name
-    new_organisation_address
-    new_organisation_telephone_number
-    new_organisation_type
-    merge_date
-  ]
+  before_action :find_resource, exclude: %i[create new]
  before_action :authenticate_user!
-  before_action :authenticate_scope!, except: [:create]
+  before_action :authenticate_scope!
+  before_action :set_organisations_answer_options, only: %i[merging_organisations absorbing_organisation update_merging_organisations remove_merging_organisation update]

  def absorbing_organisation; end
-  def confirm_telephone_number; end
-  def new_organisation_name; end
-  def new_organisation_address; end
-  def new_organisation_telephone_number; end
-  def new_organisation_type; end
  def merge_date; end
+  def existing_absorbing_organisation; end
+  def helpdesk_ticket; end
+  def merge_start_confirmation; end
+  def user_outcomes; end
+  def relationship_outcomes; end
+  def scheme_outcomes; end
+  def logs_outcomes; end

  def create
    ActiveRecord::Base.transaction do
-      @merge_request = MergeRequest.create!(merge_request_params.merge(status: :unsubmitted))
-      MergeRequestOrganisation.create!({ merge_request: @merge_request, merging_organisation: @merge_request.requesting_organisation })
+      @merge_request = MergeRequest.create!(merge_request_params.merge(status: :incomplete, requester: current_user))
    end
-    redirect_to organisations_merge_request_path(@merge_request)
+    redirect_to absorbing_organisation_merge_request_path(@merge_request)
  rescue ActiveRecord::RecordInvalid
    render_not_found
  end

-  def organisations
-    @answer_options = organisations_answer_options
-  end
-
  def update
    validate_response

    if @merge_request.errors.blank? && @merge_request.update(merge_request_params)
+      add_merging_organsations if page == "merging_organisations"
+      remove_absorbing_org_from_merging_organisations if page == "absorbing_organisation" && @merge_request.absorbing_organisation_id.present?
+
      redirect_to next_page_path
    else
      render previous_template, status: :unprocessable_entity
    end
  end

-  def update_organisations
+  def update_merging_organisations
+    @new_merging_org_ids = params["merge_request"]["new_merging_org_ids"].split(" ")
    merge_request_organisation = MergeRequestOrganisation.new(merge_request_organisation_params)
-    @answer_options = organisations_answer_options
-    if merge_request_organisation.save
-      render :organisations
+    if merge_request_organisation.valid?
+      @new_merging_org_ids.push(merge_request_organisation_params[:merging_organisation_id])
+      render :merging_organisations
    else
-      render :organisations, status: :unprocessable_entity
+      render :merging_organisations, status: :unprocessable_entity
    end
  end

  def remove_merging_organisation
+    @new_merging_org_ids = params["merge_request"]["new_merging_org_ids"] || []
+    org_id_to_remove = merge_request_organisation_params[:merging_organisation_id]
+    @new_merging_org_ids.delete(org_id_to_remove)
    MergeRequestOrganisation.find_by(merge_request_organisation_params)&.destroy!
-    @answer_options = organisations_answer_options
-    render :organisations
+    render :merging_organisations
+  end
+
+  def delete
+    @merge_request.discard!
+    flash[:notice] = "The merge request has been deleted."
+    redirect_to organisations_path(tab: "merge-requests")
+  end
+
+  def merging_organisations
+    @new_merging_org_ids = []
+  end
+
+  def start_merge
+    if @merge_request.status == "ready_to_merge"
+      @merge_request.start_merge!
+      ProcessMergeRequestJob.perform_later(merge_request: @merge_request)
+    end
+
+    redirect_to merge_request_path(@merge_request)
  end

 private
@ -70,23 +81,19 @@ private
  end

  def next_page_path
+    return merge_request_path if is_referrer_type?("check_answers")
+
    case page
    when "absorbing_organisation"
-      if create_new_organisation?
-        new_organisation_name_merge_request_path(@merge_request)
-      else
-        confirm_telephone_number_merge_request_path(@merge_request)
-      end
-    when "organisations"
-      absorbing_organisation_merge_request_path(@merge_request)
-    when "confirm_telephone_number"
+      merging_organisations_merge_request_path(@merge_request)
+    when "merging_organisations"
      merge_date_merge_request_path(@merge_request)
-    when "new_organisation_name"
-      new_organisation_address_merge_request_path(@merge_request)
-    when "new_organisation_address"
-      new_organisation_telephone_number_merge_request_path(@merge_request)
-    when "new_organisation_telephone_number"
-      new_organisation_type_merge_request_path(@merge_request)
+    when "merge_date"
+      existing_absorbing_organisation_merge_request_path(@merge_request)
+    when "existing_absorbing_organisation"
+      helpdesk_ticket_merge_request_path(@merge_request)
+    when "helpdesk_ticket"
+      merge_request_path(@merge_request)
    end
  end

@ -94,50 +101,29 @@ private
    page
  end

-  def create_new_organisation?
-    params.dig(:merge_request, :absorbing_organisation_id) == "other"
-  end
-
-  def organisations_answer_options
+  def set_organisations_answer_options
    answer_options = { "" => "Select an option" }

-    Organisation.all.pluck(:id, :name).each do |organisation|
-      answer_options[organisation[0]] = organisation[1]
+    if current_user.support?
+      Organisation.all.pluck(:id, :name).each do |organisation|
+        answer_options[organisation[0]] = organisation[1]
+      end
    end
-    answer_options
+
+    @answer_options = answer_options
  end

  def merge_request_params
    merge_params = params.fetch(:merge_request, {}).permit(
      :requesting_organisation_id,
-      :other_merging_organisations,
+      :helpdesk_ticket,
      :status,
      :absorbing_organisation_id,
-      :telephone_number_correct,
-      :new_telephone_number,
-      :new_organisation_name,
-      :new_organisation_address_line1,
-      :new_organisation_address_line2,
-      :new_organisation_postcode,
-      :new_organisation_telephone_number,
+      :merge_date,
+      :existing_absorbing_organisation,
    )

-    if merge_params[:requesting_organisation_id].present? && (current_user.data_coordinator? || current_user.data_provider?)
-      merge_params[:requesting_organisation_id] = current_user.organisation.id
-    end
-
-    if merge_params[:absorbing_organisation_id].present?
-      if create_new_organisation?
-        merge_params[:new_absorbing_organisation] = true
-        merge_params[:absorbing_organisation_id] = nil
-      else
-        merge_params[:new_absorbing_organisation] = false
-      end
-    end
-
-    if merge_params[:telephone_number_correct] == "true"
-      merge_params[:new_telephone_number] = nil
-    end
+    merge_params[:requesting_organisation_id] = current_user.organisation.id

    merge_params
  end
@ -145,18 +131,25 @@ private
  def validate_response
    case page
    when "absorbing_organisation"
-      if merge_request_params[:absorbing_organisation_id].blank? && merge_request_params[:new_absorbing_organisation].blank?
+      if merge_request_params[:absorbing_organisation_id].blank?
        @merge_request.errors.add(:absorbing_organisation_id, :blank)
      end
-    when "confirm_telephone_number"
-      if merge_request_params[:telephone_number_correct].blank?
-        @merge_request.errors.add(:telephone_number_correct, :blank) if @merge_request.absorbing_organisation.phone.present?
-        @merge_request.errors.add(:new_telephone_number, :blank) if @merge_request.absorbing_organisation.phone.blank?
+    when "merge_date"
+      day = merge_request_params["merge_date(3i)"]
+      month = merge_request_params["merge_date(2i)"]
+      year = merge_request_params["merge_date(1i)"]
+
+      return @merge_request.errors.add(:merge_date, :blank) if [day, month, year].all?(&:blank?)
+
+      if [day, month, year].none?(&:blank?) && Date.valid_date?(year.to_i, month.to_i, day.to_i)
+        merge_request_params["merge_date"] = Time.zone.local(year.to_i, month.to_i, day.to_i)
+      else
+        @merge_request.errors.add(:merge_date, :invalid)
+      end
+    when "existing_absorbing_organisation"
+      if merge_request_params[:existing_absorbing_organisation].nil?
+        @merge_request.errors.add(:existing_absorbing_organisation, :blank)
      end
-    when "new_organisation_name"
-      @merge_request.errors.add(:new_organisation_name, :blank) if merge_request_params[:new_organisation_name].blank?
-    when "new_organisation_telephone_number"
-      @merge_request.errors.add(:new_organisation_telephone_number, :blank) if merge_request_params[:new_organisation_telephone_number].blank?
    end
  end

@ -168,12 +161,42 @@ private
  end

  def find_resource
+    return if params[:id].blank?
+
    @merge_request = MergeRequest.find(params[:id])
  end

  def authenticate_scope!
-    if current_user.organisation != @merge_request.requesting_organisation && !current_user.support?
+    unless current_user.support?
      render_not_found
    end
  end
+
+  def is_referrer_type?(referrer_type)
+    from_referrer_query("referrer") == referrer_type
+  end
+
+  def from_referrer_query(query_param)
+    referrer = request.headers["HTTP_REFERER"]
+    return unless referrer
+
+    query_params = URI.parse(referrer).query
+    return unless query_params
+
+    parsed_params = CGI.parse(query_params)
+    parsed_params[query_param]&.first
+  end
+
+  def add_merging_organsations
+    new_merging_org_ids = params["merge_request"]["new_merging_org_ids"].split(" ")
+    new_merging_org_ids.each do |org_id|
+      MergeRequestOrganisation.create!(merge_request: @merge_request, merging_organisation_id: org_id)
+    end
+  end
+
+  def remove_absorbing_org_from_merging_organisations
+    if @merge_request.merge_request_organisations.where(merging_organisation_id: @merge_request.absorbing_organisation_id).exists?
+      MergeRequestOrganisation.find_by(merge_request: @merge_request, merging_organisation_id: @merge_request.absorbing_organisation_id).destroy!
+    end
+  end
 end
--- a/app/controllers/organisations_controller.rb
+++ b/app/controllers/organisations_controller.rb
@ -16,6 +16,9 @@ class OrganisationsController < ApplicationController

    all_organisations = Organisation.order(:name)
    @pagy, @organisations = pagy(filtered_collection(all_organisations.visible, search_term))
+    @merge_requests = MergeRequest.visible
+                                  .joins("LEFT JOIN organisations ON organisations.id = merge_requests.absorbing_organisation_id")
+                                  .order("organisations.name, merge_requests.merge_date DESC NULLS LAST, merge_requests.id")
    @searched = search_term.presence
    @total_count = all_organisations.visible.size
  end
@ -235,6 +238,7 @@ class OrganisationsController < ApplicationController

  def merge_request
    @merge_request = MergeRequest.new
+    render "merge_requests/merge_request"
  end

  def data_sharing_agreement
--- a/app/frontend/controllers/index.js
+++ b/app/frontend/controllers/index.js
@ -16,6 +16,9 @@ import NumericQuestionController from './numeric_question_controller.js'
 import SearchController from './search_controller.js'

 import FilterLayoutController from './filter_layout_controller.js'
+
+import TabsController from './tabs_controller.js'
+
 application.register('accessible-autocomplete', AccessibleAutocompleteController)
 application.register('conditional-filter', ConditionalFilterController)
 application.register('conditional-question', ConditionalQuestionController)
@ -23,3 +26,4 @@ application.register('govukfrontend', GovukfrontendController)
 application.register('numeric-question', NumericQuestionController)
 application.register('filter-layout', FilterLayoutController)
 application.register('search', SearchController)
+application.register('tabs', TabsController)
--- a/app/frontend/controllers/tabs_controller.js
+++ b/app/frontend/controllers/tabs_controller.js
@ -0,0 +1,35 @@
+document.addEventListener('DOMContentLoaded', function () {
+  const urlParams = new URLSearchParams(window.location.search)
+  let tab = urlParams.get('tab')
+
+  if (!tab && window.location.hash) {
+    tab = window.location.hash.substring(1)
+    urlParams.set('tab', tab)
+    window.history.replaceState(null, null, `${window.location.pathname}?${urlParams.toString()}`)
+  }
+  function activateTab (tabId) {
+    const tabElement = document.getElementById(tabId)
+    if (tabElement) {
+      tabElement.click()
+    }
+    window.history.replaceState(null, null, `${window.location.pathname}?${urlParams.toString()}`)
+  }
+
+  function handleTabClick (event) {
+    event.preventDefault()
+    const targetId = this.getAttribute('href').substring(1)
+    activateTab(targetId)
+    urlParams.set('tab', targetId)
+    window.history.replaceState(null, null, `${window.location.pathname}?${urlParams.toString()}`)
+  }
+
+  if (tab) {
+    activateTab(`tab_${tab}`)
+  }
+
+  window.scrollTo(0, 0)
+
+  document.querySelectorAll('.govuk-tabs__tab').forEach(tabElement => {
+    tabElement.addEventListener('click', handleTabClick)
+  })
+})
--- a/app/helpers/merge_requests_helper.rb
+++ b/app/helpers/merge_requests_helper.rb
@ -0,0 +1,279 @@
+module MergeRequestsHelper
+  include GovukLinkHelper
+  include GovukVisuallyHiddenHelper
+
+  def display_value_or_placeholder(value, placeholder = "You didn't answer this question")
+    value.presence || content_tag(:span, placeholder, class: "app-!-colour-muted")
+  end
+
+  def request_details(merge_request)
+    [
+      { label: "Requester", value: display_value_or_placeholder(merge_request.requester&.name) },
+      { label: "Helpdesk ticket", value: merge_request.helpdesk_ticket.present? ? link_to("#{merge_request.helpdesk_ticket} (opens in a new tab)", "https://dluhcdigital.atlassian.net/browse/#{merge_request.helpdesk_ticket}", target: "_blank", rel: "noopener noreferrer") : display_value_or_placeholder(nil), action: merge_request_action(merge_request, "helpdesk_ticket") },
+      { label: "Status", value: status_tag(merge_request.status) },
+    ]
+  end
+
+  def merge_details(merge_request)
+    [
+      { label: "Absorbing organisation", value: display_value_or_placeholder(merge_request.absorbing_organisation_name), action: merge_request_action(merge_request, "absorbing_organisation") },
+      { label: "Merging organisations", value: merge_request.merge_request_organisations.any? ? merge_request.merge_request_organisations.map(&:merging_organisation_name).join("<br>").html_safe : display_value_or_placeholder(nil), action: merge_request_action(merge_request, "merging_organisations") },
+      { label: "Merge date", value: display_value_or_placeholder(merge_request.merge_date), action: merge_request_action(merge_request, "merge_date") },
+      { label: "Absorbing organisation already active?", value: display_value_or_placeholder(merge_request.existing_absorbing_organisation_label), action: merge_request_action(merge_request, "existing_absorbing_organisation") },
+    ]
+  end
+
+  def merge_outcomes(merge_request)
+    [
+      { label: "Total users after merge", value: display_value_or_placeholder(merge_request.total_users_label), action: merge_outcome_action(merge_request, "user_outcomes") },
+      { label: "Total schemes after merge", value: display_value_or_placeholder(merge_request.total_schemes_label), action: merge_outcome_action(merge_request, "scheme_outcomes") },
+      { label: "Total logs after merge", value: display_value_or_placeholder(merge_request.total_logs_label), action: merge_outcome_action(merge_request, "logs_outcomes") },
+      { label: "Total stock owners & managing agents after merge", value: display_value_or_placeholder(merge_request.total_stock_owners_managing_agents_label), action: merge_outcome_action(merge_request, "relationship_outcomes") },
+    ]
+  end
+
+  def ordered_merging_organisations(merge_request, new_merging_org_ids)
+    Organisation.where(id: new_merging_org_ids) + merge_request.merge_request_organisations.order(created_at: :desc).map(&:merging_organisation)
+  end
+
+  def submit_merge_request_button_text(referrer)
+    if accessed_from_check_answers?(referrer)
+      "Save changes"
+    else
+      "Save and continue"
+    end
+  end
+
+  def secondary_merge_request_link_text(referrer, skip_for_now: false)
+    if accessed_from_check_answers?(referrer)
+      "Cancel"
+    elsif skip_for_now
+      "Skip for now"
+    else
+      ""
+    end
+  end
+
+  def accessed_from_check_answers?(referrer)
+    %w[check_answers].include?(referrer)
+  end
+
+  def merge_request_back_link(merge_request, page, referrer)
+    return merge_request_path(merge_request) if accessed_from_check_answers?(referrer)
+
+    case page
+    when "absorbing_organisation"
+      organisations_path(tab: "merge-requests")
+    when "merging_organisations"
+      absorbing_organisation_merge_request_path(merge_request)
+    when "merge_date"
+      merging_organisations_merge_request_path(merge_request)
+    when "existing_absorbing_organisation"
+      merge_date_merge_request_path(merge_request)
+    when "helpdesk_ticket"
+      existing_absorbing_organisation_merge_request_path(merge_request)
+    end
+  end
+
+  def merge_request_action(merge_request, page)
+    unless merge_request.status == "request_merged" || merge_request.status == "processing"
+      { text: "Change", href: send("#{page}_merge_request_path", merge_request, referrer: "check_answers"), visually_hidden_text: page.humanize }
+    end
+  end
+
+  def merge_outcome_action(merge_request, page)
+    unless merge_request.status == "request_merged" || merge_request.status == "processing"
+      { text: "View", href: send("#{page}_merge_request_path", merge_request), visually_hidden_text: page.humanize }
+    end
+  end
+
+  def submit_merge_request_url(referrer)
+    referrer == "check_answers" ? merge_request_path(referrer: "check_answers") : merge_request_path
+  end
+
+  def merging_organisations_without_users_text(organisations)
+    return "" unless organisations.count.positive?
+
+    if organisations.count == 1
+      "#{organisations.first.name} has no users."
+    else
+      "#{organisations.map(&:name).to_sentence} have no users."
+    end
+  end
+
+  def link_to_merging_organisation_users(organisation)
+    count_text = organisation.users.count == 1 ? "1 #{organisation.name} user" : "all #{organisation.users.count} #{organisation.name} users"
+    govuk_link_to "View #{count_text} (opens in a new tab)", users_organisation_path(organisation), target: "_blank"
+  end
+
+  def total_users_after_merge_text(merge_request)
+    count = merge_request.total_visible_users_after_merge
+    "#{"#{count} user".pluralize(count)} after merge"
+  end
+
+  def total_stock_owners_after_merge_text(merge_request)
+    count = merge_request.total_stock_owners_after_merge
+    "#{"#{count} stock owner".pluralize(count)} after merge"
+  end
+
+  def total_managing_agents_after_merge_text(merge_request)
+    count = merge_request.total_managing_agents_after_merge
+    "#{"#{count} managing agent".pluralize(count)} after merge"
+  end
+
+  def related_organisations(merge_request, relationship_type)
+    organisations =  merge_request.absorbing_organisation.send(relationship_type.pluralize).visible + merge_request.merging_organisations.flat_map { |org| org.send(relationship_type.pluralize).visible }
+    organisations += [merge_request.absorbing_organisation] + merge_request.merging_organisations
+    organisations.group_by { |relationship| relationship }.select { |_, occurrences| occurrences.size > 1 }.keys
+  end
+
+  def related_organisations_text(merge_request, relationship_type)
+    if related_organisations(merge_request, relationship_type).any?
+      "Some of the organisations merging have common #{relationship_type.humanize(capitalize: false).pluralize}.<br><br>"
+    else
+      ""
+    end
+  end
+
+  def organisations_without_relationships(merge_request, relationship_type)
+    ([merge_request.absorbing_organisation] + merge_request.merging_organisations).select { |org| org.send(relationship_type.pluralize).visible.empty? }
+  end
+
+  def organisations_without_relationships_text(organisations_without_relationships, relationship_type)
+    return "" unless organisations_without_relationships.any?
+
+    org_names = organisations_without_relationships.map(&:name).to_sentence
+    verb = organisations_without_relationships.count > 1 ? "have" : "has"
+    "#{org_names} #{verb} no #{relationship_type.humanize(capitalize: false).pluralize}.<br><br>"
+  end
+
+  def generate_organisation_link_text(organisation_count, org, relationship_type)
+    "View #{organisation_count == 1 ? 'the' : 'all'} #{organisation_count} #{org.name} #{relationship_type.humanize(capitalize: false).pluralize(organisation_count)} (opens in a new tab)"
+  end
+
+  def relationship_text(merge_request, relationship_type, organisation_path_helper)
+    text = ""
+    organisations_without_relationships = organisations_without_relationships(merge_request, relationship_type)
+
+    text += related_organisations_text(merge_request, relationship_type)
+    text += organisations_without_relationships_text(organisations_without_relationships, relationship_type)
+
+    ([merge_request.absorbing_organisation] + merge_request.merging_organisations).each do |org|
+      organisation_count = org.send(relationship_type.pluralize).visible.count
+      next if organisation_count.zero?
+
+      link_text = generate_organisation_link_text(organisation_count, org, relationship_type)
+      text += "#{govuk_link_to(link_text, send(organisation_path_helper, org), target: '_blank')}<br><br>"
+    end
+
+    text.html_safe
+  end
+
+  def stock_owners_text(merge_request)
+    relationship_text(merge_request, "stock_owner", :stock_owners_organisation_path)
+  end
+
+  def managing_agent_text(merge_request)
+    relationship_text(merge_request, "managing_agent", :managing_agents_organisation_path)
+  end
+
+  def merging_organisations_without_schemes_text(organisations)
+    return "" unless organisations.count.positive?
+
+    if organisations.count == 1
+      "#{organisations.first.name} has no schemes."
+    else
+      "#{organisations.map(&:name).to_sentence} have no schemes."
+    end
+  end
+
+  def link_to_merging_organisation_schemes(organisation)
+    count_text = organisation.owned_schemes.count == 1 ? "1 #{organisation.name} scheme" : "all #{organisation.owned_schemes.count} #{organisation.name} schemes"
+    govuk_link_to "View #{count_text} (opens in a new tab)", schemes_organisation_path(organisation), target: "_blank"
+  end
+
+  def total_schemes_after_merge_text(merge_request)
+    count = merge_request.total_visible_schemes_after_merge
+    "#{"#{count} scheme".pluralize(count)} after merge"
+  end
+
+  def total_lettings_logs_after_merge_text(merge_request)
+    count = merge_request.total_visible_lettings_logs_after_merge
+    "#{"#{count} lettings log".pluralize(count)} after merge"
+  end
+
+  def total_sales_logs_after_merge_text(merge_request)
+    count = merge_request.total_visible_sales_logs_after_merge
+    "#{"#{count} sales log".pluralize(count)} after merge"
+  end
+
+  def merging_organisations_lettings_logs_outcomes_text(merge_request)
+    merging_organisations_logs_outcomes_text(merge_request, "lettings")
+  end
+
+  def merging_organisations_sales_logs_outcomes_text(merge_request)
+    merging_organisations_logs_outcomes_text(merge_request, "sales")
+  end
+
+  def merging_organisations_logs_outcomes_text(merge_request, type)
+    text = ""
+    if any_organisations_have_logs?(merge_request.merging_organisations, type)
+      managed_or_reported = type == "lettings" ? "managed" : "reported"
+      merging_organisations = merge_request.merging_organisations.count == 1 ? "merging organisation" : "merging organisations"
+      text += "#{merge_request.absorbing_organisation.name} users will have access to all #{type} logs owned or #{managed_or_reported} by the #{merging_organisations} after the merge.<br><br>"
+
+      if any_organisations_have_logs_after_merge_date?(merge_request.merging_organisations, type, merge_request.merge_date)
+        startdate = type == "lettings" ? "tenancy start date" : "sale completion date"
+        text += "#{type.capitalize} logs that are owned or #{managed_or_reported} by the #{merging_organisations} and have a #{startdate} after the merge date will have their owning or managing organisation changed to #{merge_request.absorbing_organisation.name}.<br><br>"
+      end
+
+      if any_organisations_share_logs?(merge_request.merging_organisations, type)
+        text += "Some logs are owned and #{managed_or_reported} by different organisations in this merge. They appear in the list for both the owning and the managing organisation.<br><br>"
+      end
+    end
+
+    organisations_without_logs, organisations_with_logs = merge_request.merging_organisations.partition { |organisation| organisation.send("#{type}_logs").count.zero? }
+    if merge_request.absorbing_organisation.send("#{type}_logs").count.zero?
+      organisations_without_logs = [merge_request.absorbing_organisation] + organisations_without_logs
+    else
+      organisations_with_logs = [merge_request.absorbing_organisation] + organisations_with_logs
+    end
+
+    if organisations_without_logs.any?
+      text += "#{organisations_without_logs.map(&:name).to_sentence} #{organisations_without_logs.count == 1 ? 'has' : 'have'} no #{type} logs.<br><br>"
+    end
+
+    organisations_with_logs.each do |organisation|
+      text += "#{link_to_merging_organisation_logs(organisation, type)}<br><br>"
+    end
+
+    text.html_safe
+  end
+
+  def link_to_merging_organisation_logs(organisation, type)
+    count_text = organisation.send("#{type}_logs").count == 1 ? "1 #{organisation.name} #{type} log" : "all #{organisation.send("#{type}_logs").count} #{organisation.name} #{type} logs"
+    govuk_link_to "View #{count_text} (opens in a new tab)", send("#{type}_logs_organisation_path", organisation), target: "_blank"
+  end
+
+  def lettings_logs_outcomes_header_text(merge_request)
+    count = merge_request.total_visible_lettings_logs_after_merge
+    "#{count} #{'lettings log'.pluralize(count)} after merge"
+  end
+
+  def sales_logs_outcomes_header_text(merge_request)
+    count = merge_request.total_visible_sales_logs_after_merge
+    "#{count} #{'sales log'.pluralize(count)} after merge"
+  end
+
+  def any_organisations_have_logs?(organisations, type)
+    organisations.any? { |organisation| organisation.send("#{type}_logs").count.positive? }
+  end
+
+  def any_organisations_have_logs_after_merge_date?(organisations, type, merge_date)
+    organisations.any? { |organisation| organisation.send("#{type}_logs").after_date(merge_date).exists? }
+  end
+
+  def any_organisations_share_logs?(organisations, type)
+    organisations.any? { |organisation| organisation.send("#{type}_logs").filter_by_managing_organisation(organisations.where.not(id: organisation.id)).exists? }
+  end
+end
--- a/app/helpers/tag_helper.rb
+++ b/app/helpers/tag_helper.rb
@ -15,6 +15,10 @@ module TagHelper
    deleted: "Deleted",
    merged: "Merged",
    unconfirmed: "Unconfirmed",
+    merge_issues: "Merge issues",
+    request_merged: "Merged",
+    ready_to_merge: "Ready to merge",
+    processing: "Processing",
  }.freeze

  COLOUR = {
@ -31,6 +35,10 @@ module TagHelper
    deleted: "red",
    merged: "orange",
    unconfirmed: "blue",
+    merge_issues: "orange",
+    request_merged: "green",
+    ready_to_merge: "blue",
+    processing: "yellow",
  }.freeze

  def status_tag(status, classes = [])
--- a/app/jobs/process_merge_request_job.rb
+++ b/app/jobs/process_merge_request_job.rb
@ -0,0 +1,15 @@
+class ProcessMergeRequestJob < ApplicationJob
+  queue_as :default
+
+  def perform(merge_request:)
+    absorbing_organisation_id = merge_request.absorbing_organisation_id
+    merging_organisation_ids = merge_request.merging_organisations.pluck(:id)
+    merge_date = merge_request.merge_date
+    absorbing_organisation_active_from_merge_date = !merge_request.existing_absorbing_organisation unless merge_request.existing_absorbing_organisation.nil?
+
+    Merge::MergeOrganisationsService.new(absorbing_organisation_id:, merging_organisation_ids:, merge_date:, absorbing_organisation_active_from_merge_date:).call
+    merge_request.update!(request_merged: true, last_failed_attempt: nil)
+  rescue StandardError
+    merge_request.set_back_to_ready_to_merge!
+  end
+end
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@ -3,18 +3,182 @@ class MergeRequest < ApplicationRecord
  has_many :merge_request_organisations
  belongs_to :absorbing_organisation, class_name: "Organisation", optional: true
  has_many :merging_organisations, through: :merge_request_organisations, source: :merging_organisation
-  validate :organisation_name_uniqueness, if: :new_organisation_name
-  validates :new_telephone_number, presence: true, if: -> { telephone_number_correct == false }
+  belongs_to :requester, class_name: "User", optional: true

  STATUS = {
-    "unsubmitted" => 0,
-    "submitted" => 1,
+    merge_issues: "merge_issues",
+    incomplete: "incomplete",
+    ready_to_merge: "ready_to_merge",
+    processing: "processing",
+    request_merged: "request_merged",
+    deleted: "deleted",
  }.freeze
  enum status: STATUS

-  def organisation_name_uniqueness
-    if Organisation.where("lower(name) = ?", new_organisation_name&.downcase).exists?
-      errors.add(:new_organisation_name, :invalid)
+  scope :not_merged, -> { where(request_merged: [false, nil]) }
+  scope :merged, -> { where(request_merged: true) }
+  scope :visible, lambda {
+    open_collection_period_start_date = FormHandler.instance.start_date_of_earliest_open_collection_period
+    merged.where("merge_requests.merge_date >= ?", open_collection_period_start_date).or(not_merged).where(discarded_at: nil)
+  }
+
+  def absorbing_organisation_name
+    absorbing_organisation&.name || ""
+  end
+
+  def dpo_user
+    absorbing_organisation.data_protection_officers.filter_by_active.first
+  end
+
+  def discard!
+    update!(discarded_at: Time.zone.now)
+  end
+
+  def status
+    return STATUS[:deleted] if discarded_at.present?
+    return STATUS[:request_merged] if request_merged
+    return STATUS[:processing] if processing
+    return STATUS[:incomplete] unless required_questions_answered?
+    return STATUS[:ready_to_merge] if absorbing_organisation_signed_dsa?
+
+    STATUS[:merge_issues]
+  end
+
+  def required_questions_answered?
+    absorbing_organisation_id.present? &&
+      merge_date.present? &&
+      !existing_absorbing_organisation.nil? &&
+      merging_organisations.count.positive? &&
+      errors.empty?
+  end
+
+  def absorbing_organisation_signed_dsa?
+    absorbing_organisation&.data_protection_confirmed?
+  end
+
+  def total_visible_users_after_merge
+    return total_users if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    absorbing_organisation.users.visible.count + merging_organisations.sum { |org| org.users.visible.count }
+  end
+
+  def total_users_label
+    "#{total_visible_users_after_merge} #{'user'.pluralize(total_visible_users_after_merge)}"
+  end
+
+  def organisations_with_users
+    return [] unless absorbing_organisation.present? && merging_organisations.any?
+
+    ([absorbing_organisation] + merging_organisations).select(&:has_visible_users?)
+  end
+
+  def organisations_without_users
+    return [] unless absorbing_organisation.present? && merging_organisations.any?
+
+    ([absorbing_organisation] + merging_organisations).reject(&:has_visible_users?)
+  end
+
+  def total_visible_schemes_after_merge
+    return total_schemes if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    absorbing_organisation.owned_schemes.visible.count + merging_organisations.sum { |org| org.owned_schemes.visible.count }
+  end
+
+  def total_schemes_label
+    "#{total_visible_schemes_after_merge} #{'scheme'.pluralize(total_visible_schemes_after_merge)}"
+  end
+
+  def organisations_with_schemes
+    return [] unless absorbing_organisation.present? && merging_organisations.any?
+
+    ([absorbing_organisation] + merging_organisations).select(&:has_visible_schemes?)
+  end
+
+  def organisations_without_schemes
+    return [] unless absorbing_organisation.present? && merging_organisations.any?
+
+    ([absorbing_organisation] + merging_organisations).reject(&:has_visible_schemes?)
+  end
+
+  def existing_absorbing_organisation_label
+    return if existing_absorbing_organisation.nil?
+
+    existing_absorbing_organisation ? "Yes" : "No"
+  end
+
+  def filter_relationships(absorbing_relationships, merging_relationships, absorbing_organisation, merging_organisations)
+    unique_relationships = (absorbing_relationships + merging_relationships).uniq
+    unique_relationships.reject do |relationship|
+      merging_organisations.include?(relationship) || relationship == absorbing_organisation
    end
  end
+
+  def total_stock_owners_after_merge
+    return total_stock_owners if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    absorbing_stock_owners = absorbing_organisation.stock_owners.visible
+    merging_stock_owners = merging_organisations.flat_map { |org| org.stock_owners.visible }
+
+    total_filtered_stock_owners = filter_relationships(absorbing_stock_owners, merging_stock_owners, absorbing_organisation, merging_organisations)
+    total_filtered_stock_owners.count
+  end
+
+  def total_managing_agents_after_merge
+    return total_managing_agents if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    absorbing_managing_agents = absorbing_organisation.managing_agents.visible
+    merging_managing_agents = merging_organisations.flat_map { |org| org.managing_agents.visible }
+
+    total_filtered_managing_agents = filter_relationships(absorbing_managing_agents, merging_managing_agents, absorbing_organisation, merging_organisations)
+    total_filtered_managing_agents.count
+  end
+
+  def total_stock_owners_managing_agents_label
+    stock_owners_count = total_stock_owners_after_merge
+    managing_agents_count = total_managing_agents_after_merge
+
+    "#{stock_owners_count} #{'stock owner'.pluralize(stock_owners_count)}\n#{managing_agents_count} #{'managing agent'.pluralize(managing_agents_count)}"
+  end
+
+  def total_visible_sales_logs_after_merge
+    return total_sales_logs if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    (absorbing_organisation.sales_logs.visible.pluck(:id) + merging_organisations.map { |org| org.sales_logs.visible.pluck(:id) }.flatten).uniq.count
+  end
+
+  def total_visible_lettings_logs_after_merge
+    return total_lettings_logs if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    (absorbing_organisation.lettings_logs.visible.pluck(:id) + merging_organisations.map { |org| org.lettings_logs.visible.pluck(:id) }.flatten).uniq.count
+  end
+
+  def total_logs_label
+    "#{total_visible_lettings_logs_after_merge} lettings logs<br>#{total_visible_sales_logs_after_merge} sales logs"
+  end
+
+  def start_merge!
+    update!(
+      processing: true,
+      last_failed_attempt: nil,
+      total_users: total_visible_users_after_merge,
+      total_schemes: total_visible_schemes_after_merge,
+      total_stock_owners: total_stock_owners_after_merge,
+      total_managing_agents: total_managing_agents_after_merge,
+      total_lettings_logs: total_visible_lettings_logs_after_merge,
+      total_sales_logs: total_visible_sales_logs_after_merge,
+    )
+  end
+
+  def set_back_to_ready_to_merge!
+    update!(
+      last_failed_attempt: Time.zone.now,
+      processing: false,
+      total_users: nil,
+      total_schemes: nil,
+      total_stock_owners: nil,
+      total_managing_agents: nil,
+      total_lettings_logs: nil,
+      total_sales_logs: nil,
+    )
+  end
 end
--- a/app/models/merge_request_organisation.rb
+++ b/app/models/merge_request_organisation.rb
@ -5,11 +5,15 @@ class MergeRequestOrganisation < ApplicationRecord
  validates :merging_organisation, presence: { message: I18n.t("validations.merge_request.merging_organisation_id.blank") }
  validate :validate_merging_organisations

-  scope :not_unsubmitted, -> { joins(:merge_request).where.not(merge_requests: { status: "unsubmitted" }) }
+  scope :merged, -> { joins(:merge_request).where(merge_requests: { request_merged: true }) }
  scope :with_merging_organisation, ->(merging_organisation) { where(merging_organisation:) }

  has_paper_trail

+  def merging_organisation_name
+    merging_organisation.name || ""
+  end
+
 private

  def validate_merging_organisations
@ -17,12 +21,7 @@ private
      errors.add(:merging_organisation, I18n.t("validations.merge_request.organisation_part_of_another_merge"))
    end

-    if MergeRequestOrganisation.not_unsubmitted.with_merging_organisation(merging_organisation).count.positive?
-      errors.add(:merging_organisation, I18n.t("validations.merge_request.organisation_part_of_another_merge"))
-      merge_request.errors.add(:merging_organisation, I18n.t("validations.merge_request.organisation_part_of_another_merge"))
-    end
-
-    if MergeRequest.not_unsubmitted.where.not(id: merge_request_id).where(requesting_organisation: merging_organisation).count.positive?
+    if MergeRequestOrganisation.merged.with_merging_organisation(merging_organisation).count.positive?
      errors.add(:merging_organisation, I18n.t("validations.merge_request.organisation_part_of_another_merge"))
      merge_request.errors.add(:merging_organisation, I18n.t("validations.merge_request.organisation_part_of_another_merge"))
    end
--- a/app/models/organisation.rb
+++ b/app/models/organisation.rb
@ -191,4 +191,12 @@ class Organisation < ApplicationRecord
  def label
    status == :deleted ? "#{name} (deleted)" : name
  end
+
+  def has_visible_users?
+    users.visible.count.positive?
+  end
+
+  def has_visible_schemes?
+    owned_schemes.visible.count.positive?
+  end
 end
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@ -126,7 +126,8 @@
          <%= govuk_notification_banner(
            title_text: "Success",
            success: true, title_heading_level: 3,
-            title_id: "flash-notice"
+            title_id: "flash-notice",
+            role: "alert"
          ) do |notification_banner|
            notification_banner.with_heading(text: flash.notice.html_safe)
            if flash[:notification_banner_body]
--- a/app/views/merge_requests/_details_list.html.erb
+++ b/app/views/merge_requests/_details_list.html.erb
@ -0,0 +1,33 @@
+<%= govuk_summary_list do |summary_list| %>
+  <% details.each do |detail| %>
+    <% summary_list.with_row do |row| %>
+      <% row.with_key { detail[:label] } %>
+
+      <% row.with_value do %>
+          <% if detail[:value].html_safe? %>
+          <div class="govuk-!-margin-left-8 govuk-!-margin-right-4">
+            <%= raw(detail[:value]) %>
+          </div>
+          <% elsif detail[:value].is_a?(Date) || detail[:value].is_a?(Time) %>
+          <div class="govuk-!-margin-left-8 govuk-!-margin-right-4">
+            <%= detail[:value].strftime("%d %B %Y") %>
+          </div>
+          <% else %>
+            <%= simple_format(
+                  detail[:value],
+                  wrapper_tag: "span",
+                  class: "govuk-!-margin-left-8 govuk-!-margin-right-4",
+                ) %>
+          <% end %>
+      <% end %>
+
+      <% if detail[:action].present? %>
+        <% row.with_action(
+             text: detail[:action][:text],
+             href: detail[:action][:href],
+             visually_hidden_text: detail[:action][:visually_hidden_text],
+           ) %>
+      <% end %>
+    <% end %>
+  <% end %>
+<% end %>
--- a/app/views/merge_requests/_merge_request_list.html.erb
+++ b/app/views/merge_requests/_merge_request_list.html.erb
@ -0,0 +1,46 @@
+<section class="app-table-group" tabindex="0" aria-labelledby="<%= title.dasherize %>">
+  <% if @merge_requests.empty? %>
+    <p>No merge requests</p>
+  <% else %>
+  <%= govuk_table do |table| %>
+    <%= table.with_caption(classes: %w[govuk-!-font-size-19 govuk-!-font-weight-regular]) do %>
+        <strong><%= @merge_requests.not_merged.count %></strong> unresolved merge <%= @merge_requests.not_merged.count == 1 ? "request" : "requests" %>
+      <% end %>
+    <%= table.with_head do |head| %>
+      <%= head.with_row do |row| %>
+        <% row.with_cell(header: true, text: "Absorbing organisation", html_attributes: {
+          scope: "col",
+        }) %>
+        <% row.with_cell(header: true, text: "Merge date", html_attributes: {
+          scope: "col",
+        }) %>
+        <% row.with_cell(header: true, text: "Status", html_attributes: {
+          scope: "col",
+        }) %>
+        <% row.with_cell(header: true, text: "", html_attributes: {
+          scope: "col",
+        }) %>
+      <% end %>
+    <% end %>
+      <% @merge_requests.each do |merge_request| %>
+        <%= table.with_body do |body| %>
+          <%= body.with_row do |row| %>
+            <%= row.with_cell(html_attributes: { scope: "row" }) do %>
+              <%= display_value_or_placeholder(merge_request.absorbing_organisation_name) %>
+            <% end %>
+            <% merge_date = merge_request.merge_date %>
+            <%= row.with_cell(html_attributes: { scope: "row" }) do %>
+              <%= display_value_or_placeholder(merge_date&.strftime("%d %B %Y")) %>
+            <% end %>
+            <% row.with_cell(text: status_tag(merge_request.status)) %>
+            <% row.with_cell(html_attributes: {
+              scope: "row",
+            }) do %>
+              <%= govuk_link_to("View details", merge_request_path(merge_request.id)) %>
+            <% end %>
+          <% end %>
+        <% end %>
+      <% end %>
+    <% end %>
+  <% end %>
+</section>
--- a/app/views/merge_requests/_notification_banners.html.erb
+++ b/app/views/merge_requests/_notification_banners.html.erb
@ -0,0 +1,21 @@
+<% unless @merge_request.absorbing_organisation_signed_dsa? || @merge_request.absorbing_organisation_id.blank? %>
+  <%= govuk_notification_banner(title_text: "Important") do %>
+    <p class="govuk-notification-banner__heading govuk-!-width-full" style="max-width: fit-content">
+      The absorbing organisation must accept the Data Sharing Agreement before merging.
+    </p>
+    <% if @merge_request.dpo_user %>
+        Contact the Data Protection Officer: <%= link_to @merge_request.dpo_user.name, user_path(@merge_request.dpo_user.id) %>
+      <% else %>
+        <%= @merge_request.absorbing_organisation_name %> does not have a Data Protection Officer. You can assign one on the <%= link_to "users page", "#{organisation_path(@merge_request.absorbing_organisation_id)}/users" %>.
+      <% end %>
+  <% end %>
+<% end %>
+
+<% if @merge_request.last_failed_attempt.present? %>
+  <%= govuk_notification_banner(title_text: "Important") do %>
+    <p class="govuk-notification-banner__heading govuk-!-width-full" style="max-width: fit-content">
+      An error occurred while processing the merge.
+    </p>
+    No changes have been made. Try beginning the merge again.
+  <% end %>
+<% end %>
--- a/app/views/merge_requests/_summary_card.html.erb
+++ b/app/views/merge_requests/_summary_card.html.erb
@ -0,0 +1,8 @@
+<div class="govuk-summary-card govuk-!-margin-bottom-6 govuk-!-width-three-quarters">
+  <div class="govuk-summary-card__title-wrapper">
+    <h3 class="govuk-summary-card__title govuk-!-font-weight-regular"><%= title %></h3>
+  </div>
+  <div class="govuk-summary-card__content">
+    <%= render partial: "merge_requests/details_list", locals: { details: } %>
+  </div>
+</div>
--- a/app/views/merge_requests/absorbing_organisation.html.erb
+++ b/app/views/merge_requests/absorbing_organisation.html.erb
@ -1,36 +1,34 @@
 <% content_for :before_content do %>
  <% title = "Tell us if your organisation is merging" %>
  <% content_for :title, title %>
-  <%= govuk_back_link href: organisations_merge_request_path(id: @merge_request) %>
+  <%= govuk_back_link href: merge_request_back_link(@merge_request, "absorbing_organisation", request.query_parameters["referrer"]) %>
 <% end %>

-<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
+<%= form_with model: @merge_request, url: submit_merge_request_url(request.query_parameters["referrer"]), method: :patch do |f| %>
  <%= f.govuk_error_summary %>

-  <h2 class="govuk-heading-l">Which organisation is absorbing the others?</h2>
+  <h1 class="govuk-heading-l">Which organisation is absorbing the others?</h1>
  <div class="govuk-grid-row">
    <div class="govuk-grid-column-two-thirds-from-desktop">
-      <p class="govuk-body">Select the organisation that the other organisations are merging into.</p>
-
-      <%= f.govuk_radio_buttons_fieldset(
-        :absorbing_organisation_id,
-        hint: { text: "For example, if Skype and Yammer merged into Microsoft, you would select Microsoft." },
-        legend: nil,
-      ) do %>
-        <% @merge_request.merging_organisations.order(:name).each do |org| %>
-          <%= f.govuk_radio_button(
-            :absorbing_organisation_id,
-            org.id,
-            label: { text: org.name },
-          ) %>
+      <p class="govuk-hint">If organisations are merging into a new organisation, <%= govuk_link_to "create the new organisation", new_organisation_path %> first and then select it here.</p>
+      <br>
+      <%= f.govuk_select(:absorbing_organisation_id,
+        label: { text: "Select organisation name", class: "govuk-label--m" },
+        "data-controller": "accessible-autocomplete") do %>
+          <% @answer_options.map { |id, name| OpenStruct.new(id:, name:) }.each do |answer| %>
+            <option value="<%= answer.id %>"
+              data-synonyms="<%= answer_option_synonyms(answer.resource) %>"
+              data-append="<%= answer_option_append(answer.resource) %>"
+              data-hint="<%= answer_option_hint(answer.resource) %>"
+              <%= @merge_request.absorbing_organisation_id == answer.id ? "selected" : "" %>><%= answer.name || answer.resource %></option>
+          <% end %>
        <% end %>
-        <%= f.govuk_radio_divider %>
-        <%= f.govuk_radio_button :absorbing_organisation_id, "other", checked: @merge_request.new_absorbing_organisation?, label: { text: "These organisations are merging into a new one" } %>
-      <% end %>

      <%= f.hidden_field :page, value: "absorbing_organisation" %>
-
-      <%= f.govuk_submit %>
+      <div class="govuk-button-group">
+        <%= f.govuk_submit submit_merge_request_button_text(request.query_parameters["referrer"]) %>
+        <%= govuk_link_to(secondary_merge_request_link_text(request.query_parameters["referrer"]), merge_request_path(@merge_request)) %>
+      </div>
    <% end %>
  </div>
 </div>
--- a/app/views/merge_requests/confirm_telephone_number.html.erb
+++ b/app/views/merge_requests/confirm_telephone_number.html.erb
@ -1,41 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "Tell us if your organisation is merging" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: absorbing_organisation_merge_request_path(id: @merge_request) %>
-<% end %>
-
-<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
-
-  <h2 class="govuk-heading-l">What is <%= @merge_request.absorbing_organisation.name %>'s telephone number?</h2>
-
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds-from-desktop">
-      <% if @merge_request.absorbing_organisation.phone.present? %>
-        <p class="govuk-body">Confirm the telephone number on file, or enter a new one.</p>
-        <div class="govuk-inset-text">
-          <%= @merge_request.absorbing_organisation.phone %>
-        </div>
-      <% end %>
-
-      <% if @merge_request.absorbing_organisation.phone.present? %>
-        <%= f.govuk_radio_buttons_fieldset(:telephone_number_correct, legend: nil) do %>
-          <%= f.govuk_radio_button :telephone_number_correct, true, checked: @merge_request.telephone_number_correct?, label: { text: "This telephone number is correct" }, link_errors: true %>
-          <%= f.govuk_radio_button(
-            :telephone_number_correct,
-            false,
-            checked: (@merge_request.new_telephone_number.present? || @merge_request.errors.key?(:new_telephone_number)),
-            label: { text: "Enter a new phone number" },
-          ) do %>
-            <%= f.govuk_text_field :new_telephone_number, label: { text: "Telephone number" }, width: "two-thirds" %>
-          <% end %>
-          <%= f.hidden_field :page, value: "confirm_telephone_number" %>
-        <% end %>
-      <% else %>
-        <%= f.govuk_text_field :new_telephone_number, label: nil, width: "two-thirds" %>
-        <%= f.hidden_field :page, value: "confirm_telephone_number" %>
-      <% end %>
-      <%= f.govuk_submit %>
-    <% end %>
-  </div>
-</div>
--- a/app/views/merge_requests/delete_confirmation.html.erb
+++ b/app/views/merge_requests/delete_confirmation.html.erb
@ -0,0 +1,23 @@
+<% content_for :before_content do %>
+  <% content_for :title, "Are you sure you want to delete this merge request?" %>
+  <%= govuk_back_link(href: :back) %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds-from-desktop">
+    <h1 class="govuk-heading-xl">
+      <%= content_for(:title) %>
+    </h1>
+
+    <%= govuk_warning_text(text: "You will not be able to undo this action.") %>
+
+    <div class="govuk-button-group">
+      <%= govuk_button_to(
+        "Delete merge request",
+        delete_merge_request_path(@merge_request),
+        method: :delete,
+      ) %>
+      <%= govuk_button_link_to "Cancel", merge_request_path(@merge_request), secondary: true %>
+    </div>
+  </div>
+</div>
--- a/app/views/merge_requests/existing_absorbing_organisation.html.erb
+++ b/app/views/merge_requests/existing_absorbing_organisation.html.erb
@ -0,0 +1,27 @@
+<% content_for :before_content do %>
+  <% title = "Tell us if your organisation is merging" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_back_link(@merge_request, "existing_absorbing_organisation", request.query_parameters["referrer"]) %>
+<% end %>
+ <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds-from-desktop">
+    <%= form_with model: @merge_request, url: submit_merge_request_url(request.query_parameters["referrer"]), method: :patch do |f| %>
+      <%= f.govuk_error_summary %>
+      <%= f.govuk_radio_buttons_fieldset :existing_absorbing_organisation,
+                                        legend: { text: "Was #{@merge_request.absorbing_organisation&.name} already active before the merge date?", size: "l" } do %>
+        <%= f.govuk_radio_button :existing_absorbing_organisation,
+                                "true",
+                                label: { text: "Yes, this organisation existed before the merge" } %>
+        <%= f.govuk_radio_button :existing_absorbing_organisation,
+                                "false",
+                                label: { text: "No, it is a new organisation created by this merge" } %>
+      <% end %>
+
+      <%= f.hidden_field :page, value: "existing_absorbing_organisation" %>
+      <div class="govuk-button-group">
+        <%= f.govuk_submit submit_merge_request_button_text(request.query_parameters["referrer"]) %>
+        <%= govuk_link_to(secondary_merge_request_link_text(request.query_parameters["referrer"]), merge_request_path(@merge_request)) %>
+      </div>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/helpdesk_ticket.html.erb
+++ b/app/views/merge_requests/helpdesk_ticket.html.erb
@ -0,0 +1,27 @@
+<% content_for :before_content do %>
+  <% title = "Which helpdesk ticket reported this merge?" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_back_link(@merge_request, "helpdesk_ticket", request.query_parameters["referrer"]) %>
+<% end %>
+
+<%= form_with model: @merge_request, url: submit_merge_request_url(request.query_parameters["referrer"]), method: :patch do |f| %>
+  <%= f.govuk_error_summary %>
+
+  <h1 class="govuk-heading-l">Which helpdesk ticket reported this merge?</h1>
+  <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds-from-desktop">
+      <p class="govuk-hint">If this merge was reported via a helpdesk ticket, provide the ticket number.<br>The ticket will be linked to the merge request for reference.</p>
+      <br>
+      <div class="govuk-grid-row">
+        <div class="govuk-grid-column-two-thirds-from-desktop">
+          <%= f.govuk_text_field :helpdesk_ticket, caption: { text: "Ticket number", class: "govuk-label govuk-label--s" }, label: { text: "For example, MSD-12345", class: "app-!-colour-muted" } %>
+          <%= f.hidden_field :page, value: "helpdesk_ticket" %>
+          <div class="govuk-button-group">
+            <%= f.govuk_submit submit_merge_request_button_text(request.query_parameters["referrer"]) %>
+            <%= govuk_link_to(secondary_merge_request_link_text(request.query_parameters["referrer"], skip_for_now: true), merge_request_path(@merge_request)) %>
+          </div>
+        </div>
+      </div>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/logs_outcomes.html.erb
+++ b/app/views/merge_requests/logs_outcomes.html.erb
@ -0,0 +1,27 @@
+<% content_for :before_content do %>
+  <% title = "Users" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l"><%= @merge_request.absorbing_organisation_name %></span>
+  Logs
+</h1>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+      <h2 class="govuk-heading-m"><%= total_lettings_logs_after_merge_text(@merge_request) %></h2>
+      <p class="govuk-body">
+        <%= merging_organisations_lettings_logs_outcomes_text(@merge_request) %>
+      </p>
+
+      <hr class="govuk-section-break govuk-section-break--m govuk-section-break--visible govuk-!-margin-bottom-7 govuk-!-width-three-quarters ">
+
+      <h2 class="govuk-heading-m"><%= total_sales_logs_after_merge_text(@merge_request) %></h2>
+      <p class="govuk-body">
+        <%= merging_organisations_sales_logs_outcomes_text(@merge_request) %>
+      </p>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/merge_date.html.erb
+++ b/app/views/merge_requests/merge_date.html.erb
@ -1,8 +1,26 @@
 <% content_for :before_content do %>
  <% title = "Tell us if your organisation is merging" %>
  <% content_for :title, title %>
-  <%# TODO: Update this backlink to also work with the create org flow %>
-  <%= govuk_back_link href: confirm_telephone_number_merge_request_path(@merge_request) %>
+  <%= govuk_back_link href: merge_request_back_link(@merge_request, "merge_date", request.query_parameters["referrer"]) %>
 <% end %>
+ <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds-from-desktop">
+    <%= form_with model: @merge_request, url: submit_merge_request_url(request.query_parameters["referrer"]), method: :patch do |f| %>
+      <%= f.govuk_error_summary %>

-<h2 class="govuk-heading-l">What is the merge date?</h2>
+      <h2 class="govuk-heading-l">What is the merge date?</h2>
+      <p class="govuk-hint">
+        Enter the official merge date. Log and organisation page data will show the new organisation name from this date. <br><br>
+        For example, <%= date_mid_collection_year_formatted(Time.zone.now) %></p>
+      <%= f.govuk_date_field :merge_date,
+        legend: { hidden: true },
+        width: 20 do %>
+      <% end %>
+      <%= f.hidden_field :page, value: "merge_date" %>
+        <div class="govuk-button-group">
+          <%= f.govuk_submit submit_merge_request_button_text(request.query_parameters["referrer"]) %>
+          <%= govuk_link_to(secondary_merge_request_link_text(request.query_parameters["referrer"]), merge_request_path(@merge_request)) %>
+        </div>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/merge_request.html.erb
+++ b/app/views/merge_requests/merge_request.html.erb
--- a/app/views/merge_requests/merge_start_confirmation.html.erb
+++ b/app/views/merge_requests/merge_start_confirmation.html.erb
@ -0,0 +1,27 @@
+<% content_for :before_content do %>
+  <% content_for :title, "Are you sure you want to begin this merge?" %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds-from-desktop">
+    <h1 class="govuk-heading-xl">
+      <%= content_for(:title) %>
+    </h1>
+
+    <%= govuk_warning_text(text: "You will not be able to undo this action.") %>
+
+    <div class="govuk-button-group">
+      <%= govuk_button_to(
+        "Begin merge",
+        start_merge_merge_request_path(@merge_request),
+        method: :patch,
+      ) %>
+      <%= govuk_button_link_to(
+        "Cancel",
+        merge_request_path(@merge_request),
+        secondary: true,
+      ) %>
+    </div>
+  </div>
+</div>
--- a/app/views/merge_requests/merging_organisations.html.erb
+++ b/app/views/merge_requests/merging_organisations.html.erb
@ -0,0 +1,50 @@
+<% content_for :before_content do %>
+  <% title = "Tell us if your organisation is merging" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_back_link(@merge_request, "merging_organisations", request.query_parameters["referrer"]) %>
+<% end %>
+
+<%= form_with model: @merge_request, url: merging_organisations_merge_request_path(referrer: request.query_parameters["referrer"]), method: :patch do |f| %>
+  <%= f.govuk_error_summary %>
+  <h2 class="govuk-heading-l">Which organisations are merging into <%= @merge_request.absorbing_organisation&.name %>?</h2>
+
+  <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds-from-desktop">
+      <p class="govuk-hint">Add all organisations that are merging.</p>
+      <br>
+      <%= render partial: "organisation_relationships/related_organisation_select_question", locals: {
+        label: { text: "Select an organisation", class: "govuk-label--m" },
+        field: :merging_organisation,
+        question: Form::Question.new("", { "answer_options" => @answer_options.reject { |id, _org_name| id != "" && id == @merge_request.absorbing_organisation_id } }, nil),
+        f:,
+      } %>
+      <%= f.hidden_field :new_merging_org_ids, value: @new_merging_org_ids %>
+      <%= f.govuk_submit "Add organisation", secondary: true, classes: "govuk-button--secondary" %>
+      <%= govuk_table do |table| %>
+        <% ordered_merging_organisations(@merge_request, @new_merging_org_ids).each do |merging_organisation| %>
+          <%= table.with_body do |body| %>
+            <%= body.with_row do |row| %>
+              <% row.with_cell(text: merging_organisation.name) %>
+              <% row.with_cell(html_attributes: {
+                scope: "row",
+                class: "govuk-!-text-align-right",
+              }) do %>
+                <%= govuk_link_to("Remove", merging_organisations_remove_merge_request_path(merge_request: { merging_organisation: merging_organisation.id, new_merging_org_ids: @new_merging_org_ids })) %>
+              <% end %>
+            <% end %>
+          <% end %>
+        <% end %>
+      <% end %>
+    <% end %>
+    <%= form_with model: @merge_request, url: merge_request_path(id: @merge_request.id), method: :patch do |f| %>
+      <%= f.hidden_field :page, value: "merging_organisations" %>
+      <%= f.hidden_field :new_merging_org_ids, value: @new_merging_org_ids %>
+      <div class="govuk-button-group">
+        <% if @merge_request.merging_organisations.count.positive? || @new_merging_org_ids.count.positive? %>
+          <%= f.govuk_submit submit_merge_request_button_text(request.query_parameters["referrer"]) %>
+          <%= govuk_link_to secondary_merge_request_link_text(request.query_parameters["referrer"]), merge_request_path(@merge_request) %>
+        <% end %>
+      </div>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/new_organisation_address.html.erb
+++ b/app/views/merge_requests/new_organisation_address.html.erb
@ -1,33 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "New organisation address" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: new_organisation_name_merge_request_path(@merge_request) %>
-<% end %>
-
-<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
-
-  <h2 class="govuk-heading-l">What is <%= @merge_request.new_organisation_name.possessive %> address?</h2>
-   <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds-from-desktop">
-      <%= f.govuk_text_field :new_organisation_address_line1,
-        label: { text: "Address line 1", size: "m" },
-        autocomplete: "address-line1" %>
-
-      <%= f.govuk_text_field :new_organisation_address_line2,
-        label: { text: "Address line 2", size: "m" },
-        autocomplete: "address-line2" %>
-
-      <%= f.govuk_text_field :new_organisation_postcode,
-        label: { text: "Postcode", size: "m" },
-        autocomplete: "postal-code",
-        width: 10 %>
-
-      <%= f.hidden_field :page, value: "new_organisation_address" %>
-      <div class="govuk-button-group">
-        <%= f.govuk_submit %>
-        <%= govuk_link_to("Skip for now", new_organisation_telephone_number_merge_request_path(@merge_request)) %>
-      </div>
-    </div>
-  </div>
-<% end %>
--- a/app/views/merge_requests/new_organisation_name.html.erb
+++ b/app/views/merge_requests/new_organisation_name.html.erb
@ -1,19 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "New organisation name" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: absorbing_organisation_merge_request_path(id: @merge_request) %>
-<% end %>
-
-<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
-
-  <h2 class="govuk-heading-l">What is the new organisation called?</h2>
-
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds-from-desktop">
-      <%= f.govuk_text_field :new_organisation_name, label: nil %>
-      <%= f.hidden_field :page, value: "new_organisation_name" %>
-      <%= f.govuk_submit %>
-    <% end %>
-  </div>
-</div>
--- a/app/views/merge_requests/new_organisation_telephone_number.html.erb
+++ b/app/views/merge_requests/new_organisation_telephone_number.html.erb
@ -1,20 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "New organisation telephone number" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: new_organisation_address_merge_request_path(@merge_request) %>
-<% end %>
-
-<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
-
-  <h2 class="govuk-heading-l">What is <%= @merge_request.new_organisation_name.possessive %> telephone number?</h2>
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds-from-desktop">
-      <%= f.govuk_text_field :new_organisation_telephone_number, label: nil, width: "two-thirds" %>
-      <%= f.hidden_field :page, value: "new_organisation_telephone_number" %>
-      <div class="govuk-button-group">
-        <%= f.govuk_submit %>
-      </div>
-    </div>
-  </div>
-<% end %>
--- a/app/views/merge_requests/new_organisation_type.html.erb
+++ b/app/views/merge_requests/new_organisation_type.html.erb
@ -1,5 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "New organisation type" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: new_organisation_telephone_number_merge_request_path(@merge_request) %>
-<% end %>
--- a/app/views/merge_requests/organisations.html.erb
+++ b/app/views/merge_requests/organisations.html.erb
@ -1,51 +0,0 @@
-<% content_for :before_content do %>
-  <% title = "Tell us if your organisation is merging" %>
-  <% content_for :title, title %>
-  <%= govuk_back_link href: merge_request_organisation_path(id: @merge_request.requesting_organisation_id) %>
-<% end %>
-
-<%= form_with model: @merge_request, url: organisations_merge_request_path, method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
-  <h2 class="govuk-heading-l">Which organisations are merging?</h2>
-
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds-from-desktop">
-    <p class="govuk-body">
-      Add all organisations to be merged - we have already added your own.
-    </p>
-
-    <p class="govuk-body">Start typing to search</p>
-    <%= render partial: "organisation_relationships/related_organisation_select_question", locals: {
-      field: :merging_organisation,
-      question: Form::Question.new("", { "answer_options" => @answer_options }, nil),
-      f:,
-    } %>
-    <%= f.govuk_submit "Add organisation", classes: "govuk-button--secondary" %>
-    <%= govuk_table do |table| %>
-      <% @merge_request.merging_organisations.order(:name).each do |merging_organisation| %>
-        <%= table.with_body do |body| %>
-          <%= body.with_row do |row| %>
-            <% row.with_cell(text: merging_organisation.name) %>
-            <% row.with_cell(html_attributes: {
-              scope: "row",
-              class: "govuk-!-text-align-right",
-            }) do %>
-              <% if @merge_request.requesting_organisation != merging_organisation %>
-                <%= govuk_link_to("Remove", organisations_remove_merge_request_path(merge_request: { merging_organisation: merging_organisation.id })) %>
-              <% end %>
-            <% end %>
-          <% end %>
-        <% end %>
-      <% end %>
-    <% end %>
-  <% end %>
-  <%= form_with model: @merge_request, url: merge_request_path(id: @merge_request.id), method: :patch do |f| %>
-    <%= govuk_details(summary_text: "I cannot find an organisation on the list") do %>
-      <%= f.govuk_text_area :other_merging_organisations, label: { text: "Other organisations" }, hint: { text: "List other organisations that are part of the merge but not registered on CORE." }, rows: 9 %>
-    <% end %>
-    <% if @merge_request.merging_organisations.count > 1 %>
-      <%= f.hidden_field :page, value: "organisations" %>
-      <%= f.govuk_submit "Continue" %>
-    <% end %>
-  <% end %>
-</div>
--- a/app/views/merge_requests/relationship_outcomes.html.erb
+++ b/app/views/merge_requests/relationship_outcomes.html.erb
@ -0,0 +1,25 @@
+<% content_for :before_content do %>
+  <% title = "Stock owners & managing agents".html_safe %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l"><%= @merge_request.absorbing_organisation_name %></span>
+  Stock owners & managing agents
+</h1>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+      <h2 class="govuk-heading-m"><%= total_stock_owners_after_merge_text(@merge_request) %></h2>
+      <p class="govuk-body">
+        <%= stock_owners_text(@merge_request) %>
+      </p>
+      <hr class="govuk-section-break govuk-section-break--m govuk-section-break--visible govuk-!-margin-bottom-7 govuk-!-width-three-quarters ">
+      <h2 class="govuk-heading-m"><%= total_managing_agents_after_merge_text(@merge_request) %></h2>
+      <p class="govuk-body">
+        <%= managing_agent_text(@merge_request) %>
+      </p>
+    <% end %>
+  </div>
+</div>
--- a/app/views/merge_requests/scheme_outcomes.html.erb
+++ b/app/views/merge_requests/scheme_outcomes.html.erb
@ -0,0 +1,23 @@
+<% content_for :before_content do %>
+  <% title = "Schemes" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l"><%= @merge_request.absorbing_organisation_name %></span>
+  Schemes
+</h1>
+
+<% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+  <h2 class="govuk-heading-m"><%= total_schemes_after_merge_text(@merge_request) %></h2>
+   <p class="govuk-body">
+    <%= merging_organisations_without_schemes_text(@merge_request.organisations_without_schemes) %>
+  </p>
+
+  <% @merge_request.organisations_with_schemes.map do |org| %>
+    <p class="govuk-body">
+      <%= link_to_merging_organisation_schemes(org) %>
+    </p>
+  <% end %>
+<% end %>
--- a/app/views/merge_requests/show.html.erb
+++ b/app/views/merge_requests/show.html.erb
@ -0,0 +1,26 @@
+<% content_for :before_content do %>
+  <% title = "Merge request: #{@merge_request.absorbing_organisation_name}" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: organisations_path(tab: "merge-requests") %>
+<% end %>
+
+<%= render partial: "notification_banners" %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l">Merge request</span>
+  <%= display_value_or_placeholder(@merge_request.absorbing_organisation_name) %>
+</h1>
+<% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+<div class="govuk-button-group">
+  <%= govuk_button_link_to "Begin merge", merge_start_confirmation_merge_request_path(@merge_request), disabled: @merge_request.status != "ready_to_merge" %>
+  <%= govuk_button_link_to "Delete merge request", delete_confirmation_merge_request_path(@merge_request), warning: true %>
+</div>
+<% end %>
+
+<%= render partial: "merge_requests/summary_card", locals: { title: "Request details", details: request_details(@merge_request) } %>
+
+<%= render partial: "merge_requests/summary_card", locals: { title: "Merge details", details: merge_details(@merge_request) } %>
+
+<% unless @merge_request.status == "incomplete" %>
+  <%= render partial: "merge_requests/summary_card", locals: { title: "Merge outcomes", details: merge_outcomes(@merge_request) } %>
+<% end %>
--- a/app/views/merge_requests/user_outcomes.html.erb
+++ b/app/views/merge_requests/user_outcomes.html.erb
@ -0,0 +1,23 @@
+<% content_for :before_content do %>
+  <% title = "Users" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l"><%= @merge_request.absorbing_organisation_name %></span>
+  Users
+</h1>
+
+<% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+  <h2 class="govuk-heading-m"><%= total_users_after_merge_text(@merge_request) %></h2>
+   <p class="govuk-body">
+    <%= merging_organisations_without_users_text(@merge_request.organisations_without_users) %>
+  </p>
+
+  <% @merge_request.organisations_with_users.map do |org| %>
+    <p class="govuk-body">
+      <%= link_to_merging_organisation_users(org) %>
+    </p>
+  <% end %>
+<% end %>
--- a/app/views/organisation_relationships/_related_organisation_select_question.html.erb
+++ b/app/views/organisation_relationships/_related_organisation_select_question.html.erb
@ -1,3 +1,3 @@
 <% answers = question.answer_options.map { |key, value| OpenStruct.new(id: key, name: value) } %>
-<%= f.govuk_collection_select field, answers, :id, :name, label: { hidden: true }, "data-controller": "accessible-autocomplete" do %>
+<%= f.govuk_collection_select field, answers, :id, :name, label:, "data-controller": "accessible-autocomplete" do %>
 <% end %>
--- a/app/views/organisation_relationships/add_managing_agent.html.erb
+++ b/app/views/organisation_relationships/add_managing_agent.html.erb
@ -19,6 +19,7 @@
  <% end %>
  <%= render partial: "organisation_relationships/related_organisation_select_question", locals: {
    field: :child_organisation_id,
+    label: { hidden: true },
    question: Form::Question.new("", { "answer_options" => answer_options }, nil),
    f:,
  } %>
--- a/app/views/organisation_relationships/add_stock_owner.html.erb
+++ b/app/views/organisation_relationships/add_stock_owner.html.erb
@ -19,6 +19,7 @@
  <% end %>
  <%= render partial: "organisation_relationships/related_organisation_select_question", locals: {
    field: :parent_organisation_id,
+    label: { hidden: true },
    question: Form::Question.new("", { "answer_options" => answer_options }, nil),
    f:,
  } %>
--- a/app/views/organisations/index.html.erb
+++ b/app/views/organisations/index.html.erb
@ -5,13 +5,18 @@

 <%= render partial: "organisations/headings", locals: request.path == organisations_path ? { main: "Organisations", sub: nil } : { main: @organisation.name, sub: "Organisations" } %>

-<% if current_user.support? %>
-  <%= govuk_button_link_to "Create a new organisation", new_organisation_path, html: { method: :get } %>
-<% end %>
-
-<%= render SearchComponent.new(current_user:, search_label: "Search by organisation name", value: @searched) %>
-
-<%= govuk_section_break(visible: true, size: "m") %>
-
-<%= render partial: "organisation_list", locals: { organisations: @organisations, title: "Organisations", pagy: @pagy, searched: @searched, item_label:, total_count: @total_count } %>
-<%== render partial: "pagy/nav", locals: { pagy: @pagy, item_name: "organisations" } %>
+<div class="app-tab__list-view" data-controller="tabs">
+  <%= govuk_tabs(title: "Collection resources", classes: %w[app-tab__large-headers]) do |c| %>
+    <% c.with_tab(label: "All organisations") do %>
+      <%= govuk_button_link_to "Create a new organisation", new_organisation_path, html: { method: :get } %>
+      <%= render SearchComponent.new(current_user:, search_label: "Search by organisation name", value: @searched) %>
+      <%= govuk_section_break(visible: true, size: "m") %>
+      <%= render partial: "organisation_list", locals: { organisations: @organisations, title: "Organisations", pagy: @pagy, searched: @searched, item_label:, total_count: @total_count } %>
+      <%== render partial: "pagy/nav", locals: { pagy: @pagy, item_name: "organisations" } %>
+    <% end %>
+    <% c.with_tab(label: "Merge requests") do %>
+      <%= govuk_button_to "Create new merge request", merge_requests_path, html: { method: :post } %>
+      <%= render partial: "merge_requests/merge_request_list", locals: { merge_requests: @merge_requests, title: "Merge requests", pagy: @pagy, searched: @searched, item_label:, total_count: @total_count } %>
+    <% end %>
+  <% end %>
+</div>
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@ -175,17 +175,12 @@ en:
        merge_request:
          attributes:
            absorbing_organisation_id:
-              blank: "Select the organisation absorbing the others"
-            telephone_number_correct:
-              blank: "Select to confirm or enter a new telephone number"
-              invalid: "Enter a valid telephone number"
-            new_telephone_number:
-              blank: "Enter a valid telephone number"
-            new_organisation_name:
-              blank: "Enter an organisation name"
-              invalid: "An organisation with this name already exists"
-            new_organisation_telephone_number:
-              blank: "Enter a valid telephone number"
+              blank: "Select the absorbing organisation"
+            merge_date: 
+              blank: "Enter a merge date"
+              invalid: "Enter a valid merge date"
+            existing_absorbing_organisation:
+              blank: "You must answer absorbing organisation already active?"

  notification:
    logs_deleted:
--- a/config/routes.rb
+++ b/config/routes.rb
@ -203,16 +203,21 @@ Rails.application.routes.draw do

  resources :merge_requests, path: "/merge-request" do
    member do
-      get "organisations"
-      patch "organisations", to: "merge_requests#update_organisations"
-      get "organisations/remove", to: "merge_requests#remove_merging_organisation"
+      get "merging-organisations"
+      patch "merging-organisations", to: "merge_requests#update_merging_organisations"
+      get "merging-organisations/remove", to: "merge_requests#remove_merging_organisation"
      get "absorbing-organisation"
-      get "confirm-telephone-number"
-      get "new-organisation-name"
-      get "new-organisation-address"
-      get "new-organisation-telephone-number"
-      get "new-organisation-type"
      get "merge-date"
+      get "existing-absorbing-organisation"
+      get "helpdesk-ticket"
+      get "merge-start-confirmation"
+      get "user-outcomes"
+      get "relationship-outcomes"
+      get "scheme-outcomes"
+      get "logs-outcomes"
+      get "delete-confirmation", to: "merge_requests#delete_confirmation"
+      delete "delete", to: "merge_requests#delete"
+      patch "start-merge", to: "merge_requests#start_merge"
    end
  end

--- a/db/migrate/20240808134014_add_merge_date_to_merge_requests.rb
+++ b/db/migrate/20240808134014_add_merge_date_to_merge_requests.rb
@ -0,0 +1,5 @@
+class AddMergeDateToMergeRequests < ActiveRecord::Migration[7.0]
+  def change
+    add_column :merge_requests, :merge_date, :datetime
+  end
+end
--- a/db/migrate/20240809154241_add_additional_fields_to_merge_requests.rb
+++ b/db/migrate/20240809154241_add_additional_fields_to_merge_requests.rb
@ -0,0 +1,16 @@
+class AddAdditionalFieldsToMergeRequests < ActiveRecord::Migration[7.0]
+  def change
+    change_table :merge_requests, bulk: true do |t|
+      t.integer :requester_id
+      t.string :helpdesk_ticket
+      t.integer :total_users
+      t.integer :total_schemes
+      t.integer :total_lettings_logs
+      t.integer :total_sales_logs
+      t.integer :total_stock_owners
+      t.integer :total_managing_agents
+      t.boolean :signed_dsa, default: false
+      t.datetime :discarded_at
+    end
+  end
+end
--- a/db/migrate/20240813072041_remove_other_merging_org_field.rb
+++ b/db/migrate/20240813072041_remove_other_merging_org_field.rb
@ -0,0 +1,5 @@
+class RemoveOtherMergingOrgField < ActiveRecord::Migration[7.0]
+  def change
+    remove_column :merge_requests, :other_merging_organisations, :string
+  end
+end
--- a/db/migrate/20240813112119_remove_new_org_merge_request_fields.rb
+++ b/db/migrate/20240813112119_remove_new_org_merge_request_fields.rb
@ -0,0 +1,27 @@
+class RemoveNewOrgMergeRequestFields < ActiveRecord::Migration[7.0]
+  def up
+    change_table :merge_requests, bulk: true do |t|
+      t.remove :new_absorbing_organisation
+      t.remove :telephone_number_correct
+      t.remove :new_telephone_number
+      t.remove :new_organisation_name
+      t.remove :new_organisation_address_line1
+      t.remove :new_organisation_address_line2
+      t.remove :new_organisation_postcode
+      t.remove :new_organisation_telephone_number
+    end
+  end
+
+  def down
+    change_table :merge_requests, bulk: true do |t|
+      t.column :new_absorbing_organisation, :boolean
+      t.column :telephone_number_correct, :boolean
+      t.column :new_telephone_number, :string
+      t.column :new_organisation_name, :string
+      t.column :new_organisation_address_line1, :string
+      t.column :new_organisation_address_line2, :string
+      t.column :new_organisation_postcode, :string
+      t.column :new_organisation_telephone_number, :string
+    end
+  end
+end
--- a/db/migrate/20240814083017_add_last_failed_attempt.rb
+++ b/db/migrate/20240814083017_add_last_failed_attempt.rb
@ -0,0 +1,5 @@
+class AddLastFailedAttempt < ActiveRecord::Migration[7.0]
+  def change
+    add_column :merge_requests, :last_failed_attempt, :datetime
+  end
+end
--- a/db/migrate/20240819100411_update_merge_request_fields_for_status.rb
+++ b/db/migrate/20240819100411_update_merge_request_fields_for_status.rb
@ -0,0 +1,17 @@
+class UpdateMergeRequestFieldsForStatus < ActiveRecord::Migration[7.0]
+  def up
+    change_table :merge_requests, bulk: true do |t|
+      t.column :request_merged, :boolean
+      t.column :processing, :boolean
+      t.remove :status
+    end
+  end
+
+  def down
+    change_table :merge_requests, bulk: true do |t|
+      t.remove :request_merged
+      t.remove :processing
+      t.column :status, :string
+    end
+  end
+end
--- a/db/migrate/20240822080228_add_existing_absorbing_organisation_field.rb
+++ b/db/migrate/20240822080228_add_existing_absorbing_organisation_field.rb
@ -0,0 +1,5 @@
+class AddExistingAbsorbingOrganisationField < ActiveRecord::Migration[7.0]
+  def change
+    add_column :merge_requests, :existing_absorbing_organisation, :boolean
+  end
+end
--- a/db/schema.rb
+++ b/db/schema.rb
@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.

-ActiveRecord::Schema[7.0].define(version: 2024_08_19_143150) do
+ActiveRecord::Schema[7.0].define(version: 2024_08_22_080228) do
  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

@ -429,19 +429,24 @@ ActiveRecord::Schema[7.0].define(version: 2024_08_19_143150) do

  create_table "merge_requests", force: :cascade do |t|
    t.integer "requesting_organisation_id"
-    t.text "other_merging_organisations"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
-    t.integer "status"
    t.integer "absorbing_organisation_id"
-    t.boolean "new_absorbing_organisation"
-    t.boolean "telephone_number_correct"
-    t.string "new_telephone_number"
-    t.string "new_organisation_name"
-    t.string "new_organisation_address_line1"
-    t.string "new_organisation_address_line2"
-    t.string "new_organisation_postcode"
-    t.string "new_organisation_telephone_number"
+    t.datetime "merge_date"
+    t.integer "requester_id"
+    t.string "helpdesk_ticket"
+    t.integer "total_users"
+    t.integer "total_schemes"
+    t.integer "total_lettings_logs"
+    t.integer "total_sales_logs"
+    t.integer "total_stock_owners"
+    t.integer "total_managing_agents"
+    t.boolean "signed_dsa", default: false
+    t.datetime "discarded_at"
+    t.datetime "last_failed_attempt"
+    t.boolean "request_merged"
+    t.boolean "processing"
+    t.boolean "existing_absorbing_organisation"
  end

  create_table "notifications", force: :cascade do |t|
--- a/spec/factories/merge_request.rb
+++ b/spec/factories/merge_request.rb
@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :merge_request do
+    status { "incomplete" }
+    merge_date { nil }
+    helpdesk_ticket { "MSD-99999" }
+    association :requesting_organisation, factory: :organisation
+  end
+end
--- a/spec/factories/merge_request_organisation.rb
+++ b/spec/factories/merge_request_organisation.rb
@ -0,0 +1,6 @@
+FactoryBot.define do
+  factory :merge_request_organisation do
+    association :merging_organisation, factory: :organisation
+    association :merge_request, factory: :merge_request
+  end
+end
--- a/spec/features/schemes_spec.rb
+++ b/spec/features/schemes_spec.rb
@ -766,8 +766,10 @@ RSpec.describe "Schemes scheme Features" do

          before do
            Timecop.freeze(Time.zone.local(2023, 10, 10))
+            Singleton.__init__(FormHandler)
            FactoryBot.create(:location_deactivation_period, deactivation_date: Time.zone.local(2022, 6, 4), location: deactivated_location)
            Timecop.unfreeze
+            Singleton.__init__(FormHandler)
            click_link(scheme.service_name)
          end

--- a/spec/helpers/merge_requests_helper_spec.rb
+++ b/spec/helpers/merge_requests_helper_spec.rb
@ -0,0 +1,272 @@
+require "rails_helper"
+
+RSpec.describe MergeRequestsHelper do
+  describe "#merging_organisations_without_users_text" do
+    context "with 1 organisation" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_users_text([organisation])).to eq("Org 1 has no users.")
+      end
+    end
+
+    context "with 2 organisations" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+      let(:organisation_2) { build(:organisation, name: "Org 2") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_users_text([organisation, organisation_2])).to eq("Org 1 and Org 2 have no users.")
+      end
+    end
+
+    context "with 3 organisations" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+      let(:organisation_2) { build(:organisation, name: "Org 2") }
+      let(:organisation_3) { build(:organisation, name: "Org 3") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_users_text([organisation, organisation_2, organisation_3])).to eq("Org 1, Org 2, and Org 3 have no users.")
+      end
+    end
+  end
+
+  describe "#link_to_merging_organisation_users" do
+    context "with 1 organisation user" do
+      let(:organisation) { create(:organisation, name: "Org 1") }
+
+      it "returns the correct link" do
+        expect(link_to_merging_organisation_users(organisation)).to include("View 1 Org 1 user (opens in a new tab)")
+        expect(link_to_merging_organisation_users(organisation)).to include(users_organisation_path(organisation))
+      end
+    end
+
+    context "with multiple organisation users" do
+      let(:organisation) { create(:organisation, name: "Org 1") }
+
+      before do
+        create(:user, organisation:)
+      end
+
+      it "returns the correct link" do
+        expect(link_to_merging_organisation_users(organisation)).to include("View all 2 Org 1 users (opens in a new tab)")
+        expect(link_to_merging_organisation_users(organisation)).to include(users_organisation_path(organisation))
+      end
+    end
+  end
+
+  describe "#merging_organisations_without_schemes_text" do
+    context "with 1 organisation" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_schemes_text([organisation])).to eq("Org 1 has no schemes.")
+      end
+    end
+
+    context "with 2 organisations" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+      let(:organisation_2) { build(:organisation, name: "Org 2") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_schemes_text([organisation, organisation_2])).to eq("Org 1 and Org 2 have no schemes.")
+      end
+    end
+
+    context "with 3 organisations" do
+      let(:organisation) { build(:organisation, name: "Org 1") }
+      let(:organisation_2) { build(:organisation, name: "Org 2") }
+      let(:organisation_3) { build(:organisation, name: "Org 3") }
+
+      it "returns the correct text" do
+        expect(merging_organisations_without_schemes_text([organisation, organisation_2, organisation_3])).to eq("Org 1, Org 2, and Org 3 have no schemes.")
+      end
+    end
+  end
+
+  describe "#link_to_merging_organisation_schemes" do
+    context "with 1 organisation scheme" do
+      let(:organisation) { create(:organisation, name: "Org 1") }
+
+      before do
+        create(:scheme, owning_organisation: organisation)
+      end
+
+      it "returns the correct link" do
+        expect(link_to_merging_organisation_schemes(organisation)).to include("View 1 Org 1 scheme (opens in a new tab)")
+        expect(link_to_merging_organisation_schemes(organisation)).to include(schemes_organisation_path(organisation))
+      end
+    end
+
+    context "with multiple organisation schemes" do
+      let(:organisation) { create(:organisation, name: "Org 1") }
+
+      before do
+        create_list(:scheme, 2, owning_organisation: organisation)
+      end
+
+      it "returns the correct link" do
+        expect(link_to_merging_organisation_schemes(organisation)).to include("View all 2 Org 1 schemes (opens in a new tab)")
+        expect(link_to_merging_organisation_schemes(organisation)).to include(schemes_organisation_path(organisation))
+      end
+    end
+  end
+
+  describe "when creating relationship outcomes content" do
+    let(:stock_owner1) { create(:organisation, name: "Stock owner 1") }
+    let(:stock_owner2) { create(:organisation, name: "Stock owner 2") }
+    let(:managing_agent1) { create(:organisation, name: "Managing agent 1") }
+    let(:managing_agent2) { create(:organisation, name: "Managing agent 2") }
+    let(:absorbing_organisation) { create(:organisation, name: "Absorbing Org") }
+    let(:merging_organisations) { create_list(:organisation, 2) { |org, i| org.name = "Dummy Org #{i + 1}" } }
+    let(:merge_request) { create(:merge_request, absorbing_organisation:, merging_organisations:) }
+
+    context "when there are no relationships" do
+      it "returns text stating there are no stock owners" do
+        expect(stock_owners_text(merge_request)).to eq("Absorbing Org, Dummy Org 1, and Dummy Org 2 have no stock owners.<br><br>")
+      end
+
+      it "returns text stating there are no managing agents" do
+        expect(managing_agent_text(merge_request)).to eq("Absorbing Org, Dummy Org 1, and Dummy Org 2 have no managing agents.<br><br>")
+      end
+    end
+
+    context "when there are stock owners" do
+      before do
+        create(:organisation_relationship, child_organisation: absorbing_organisation, parent_organisation: stock_owner1)
+        create(:organisation_relationship, child_organisation: merging_organisations.first, parent_organisation: stock_owner2)
+        create(:organisation_relationship, child_organisation: merging_organisations.first, parent_organisation: stock_owner1)
+      end
+
+      it "returns text stating the relationships" do
+        expect(stock_owners_text(merge_request)).to include("Some of the organisations merging have common stock owners.")
+        expect(stock_owners_text(merge_request)).to include("Dummy Org 2 has no stock owners.")
+        expect(stock_owners_text(merge_request)).to include("<a class=\"govuk-link\" target=\"_blank\" href=\"/organisations/#{merging_organisations.first.id}/stock-owners\">View all 2 Dummy Org 1 stock owners (opens in a new tab)</a>")
+      end
+    end
+
+    context "when there are managing agents" do
+      before do
+        create(:organisation_relationship, parent_organisation: absorbing_organisation, child_organisation: managing_agent1)
+        create(:organisation_relationship, parent_organisation: absorbing_organisation, child_organisation: managing_agent2)
+        create(:organisation_relationship, parent_organisation: merging_organisations.first, child_organisation: managing_agent2)
+      end
+
+      it "returns text stating the relationships" do
+        expect(managing_agent_text(merge_request)).to include("Some of the organisations merging have common managing agents.")
+        expect(managing_agent_text(merge_request)).to include("Dummy Org 2 has no managing agents.")
+        expect(managing_agent_text(merge_request)).to include("<a class=\"govuk-link\" target=\"_blank\" href=\"/organisations/#{merging_organisations.first.id}/managing-agents\">View the 1 Dummy Org 1 managing agent (opens in a new tab)</a>")
+      end
+    end
+  end
+
+  describe "logs outcomes summary" do
+    let(:organisation) { create(:organisation, name: "Org 1") }
+    let(:merging_organisation) { create(:organisation, name: "Org 2") }
+    let(:merging_organisation_2) { create(:organisation, name: "Org 3") }
+    let(:merge_request) { create(:merge_request, absorbing_organisation: organisation, merge_date: Time.zone.today) }
+
+    before do
+      create(:merge_request_organisation, merge_request:, merging_organisation:)
+    end
+
+    context "when merging organisations don't have logs" do
+      it "returns the correct merging_organisations_lettings_logs_outcomes_text text" do
+        outcome_text = merging_organisations_lettings_logs_outcomes_text(merge_request)
+        expect(outcome_text).not_to include("Org 1 users will have access to all lettings logs owned or managed by the merging organisation after the merge.")
+        expect(outcome_text).not_to include("Lettings logs that are owned or managed by the merging organisation and have a tenancy start date after the merge date will have their owning or managing organisation changed to Org 1.")
+        expect(outcome_text).not_to include("Some logs are owned and managed by different organisations in this merge. They appear in the list for both the owning and the managing organisation.")
+        expect(outcome_text).to include("Org 1 and Org 2 have no lettings logs.")
+      end
+
+      it "returns correct lettings_logs_outcomes_header_text" do
+        expect(lettings_logs_outcomes_header_text(merge_request)).to eq("0 lettings logs after merge")
+      end
+
+      it "returns the correct merging_organisations_sales_logs_outcomes_text text" do
+        outcome_text = merging_organisations_sales_logs_outcomes_text(merge_request)
+        expect(outcome_text).not_to include("Org 1 users will have access to all sales logs owned or reported by the merging organisation after the merge.")
+        expect(outcome_text).not_to include("Sales logs that are owned or reported by the merging organisation and have a sale completion date after the merge date will have their owning or managing organisation changed to Org 1.")
+        expect(outcome_text).not_to include("Some logs are owned and reported by different organisation in this merge. They appear in the list for both the owning and the managing organisation.")
+        expect(outcome_text).to include("Org 1 and Org 2 have no sales logs.")
+      end
+
+      it "returns correct sales_logs_outcomes_header_text" do
+        expect(sales_logs_outcomes_header_text(merge_request)).to eq("0 sales logs after merge")
+      end
+    end
+
+    context "when merging organisations have logs" do
+      before do
+        create(:lettings_log, owning_organisation: organisation)
+        create(:lettings_log, owning_organisation: merging_organisation, startdate: Time.zone.tomorrow)
+        create(:lettings_log, owning_organisation: merging_organisation, startdate: Time.zone.yesterday)
+        create(:sales_log, owning_organisation: organisation)
+        create(:sales_log, owning_organisation: merging_organisation, saledate: Time.zone.tomorrow)
+        create(:sales_log, owning_organisation: merging_organisation, saledate: Time.zone.yesterday)
+      end
+
+      it "returns the correct merging_organisations_lettings_logs_outcomes_text text" do
+        outcome_text = merging_organisations_lettings_logs_outcomes_text(merge_request)
+        expect(outcome_text).to include("Org 1 users will have access to all lettings logs owned or managed by the merging organisation after the merge.")
+        expect(outcome_text).to include("Lettings logs that are owned or managed by the merging organisation and have a tenancy start date after the merge date will have their owning or managing organisation changed to Org 1.")
+        expect(outcome_text).not_to include("Some logs are owned and managed by different organisations in this merge. They appear in the list for both the owning and the managing organisation.")
+        expect(outcome_text).not_to include("Org 2 has no lettings logs.")
+        expect(outcome_text).to include("View all 2 Org 2 lettings logs (opens in a new tab)")
+      end
+
+      it "returns correct lettings_logs_outcomes_header_text" do
+        expect(lettings_logs_outcomes_header_text(merge_request)).to eq("3 lettings logs after merge")
+      end
+
+      it "returns the correct merging_organisations_sales_logs_outcomes_text text" do
+        outcome_text = merging_organisations_sales_logs_outcomes_text(merge_request)
+        expect(outcome_text).to include("Org 1 users will have access to all sales logs owned or reported by the merging organisation after the merge.")
+        expect(outcome_text).to include("Sales logs that are owned or reported by the merging organisation and have a sale completion date after the merge date will have their owning or managing organisation changed to Org 1.")
+        expect(outcome_text).not_to include("Some logs are owned and reported by different organisations in this merge. They appear in the list for both the owning and the managing organisation.")
+        expect(outcome_text).not_to include("Org 2 has no sales logs.")
+        expect(outcome_text).to include("View all 2 Org 2 sales logs (opens in a new tab)")
+      end
+
+      it "returns correct sales_logs_outcomes_header_text" do
+        expect(sales_logs_outcomes_header_text(merge_request)).to eq("3 sales logs after merge")
+      end
+
+      context "when logs are owned and managed by organisations in the same merge" do
+        before do
+          create(:organisation_relationship, parent_organisation: merging_organisation_2, child_organisation: merging_organisation)
+          create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+          create(:lettings_log, assigned_to: merging_organisation_2.users.first, owning_organisation: merging_organisation_2, managing_organisation: merging_organisation, startdate: Time.zone.yesterday)
+          create(:sales_log, assigned_to: merging_organisation_2.users.first, owning_organisation: merging_organisation_2, managing_organisation: merging_organisation, saledate: Time.zone.yesterday)
+        end
+
+        it "returns the correct merging_organisations_lettings_logs_outcomes_text text" do
+          outcome_text = merging_organisations_lettings_logs_outcomes_text(merge_request)
+          expect(outcome_text).to include("Org 1 users will have access to all lettings logs owned or managed by the merging organisations after the merge.")
+          expect(outcome_text).to include("Lettings logs that are owned or managed by the merging organisations and have a tenancy start date after the merge date will have their owning or managing organisation changed to Org 1.")
+          expect(outcome_text).to include("Some logs are owned and managed by different organisations in this merge. They appear in the list for both the owning and the managing organisation.")
+          expect(outcome_text).not_to include("Org 2 has no lettings logs.")
+          expect(outcome_text).to include("View all 3 Org 2 lettings logs (opens in a new tab)")
+          expect(outcome_text).to include("View 1 Org 3 lettings log (opens in a new tab)")
+        end
+
+        it "returns correct lettings_logs_outcomes_header_text" do
+          expect(lettings_logs_outcomes_header_text(merge_request)).to eq("4 lettings logs after merge")
+        end
+
+        it "returns the correct merging_organisations_sales_logs_outcomes_text text" do
+          outcome_text = merging_organisations_sales_logs_outcomes_text(merge_request)
+          expect(outcome_text).to include("Org 1 users will have access to all sales logs owned or reported by the merging organisations after the merge.")
+          expect(outcome_text).to include("Sales logs that are owned or reported by the merging organisations and have a sale completion date after the merge date will have their owning or managing organisation changed to Org 1.")
+          expect(outcome_text).to include("Some logs are owned and reported by different organisations in this merge. They appear in the list for both the owning and the managing organisation.")
+          expect(outcome_text).not_to include("Org 2 has no sales logs.")
+          expect(outcome_text).to include("View all 3 Org 2 sales logs (opens in a new tab)")
+          expect(outcome_text).to include("View 1 Org 3 sales log (opens in a new tab)")
+        end
+
+        it "returns correct sales_logs_outcomes_header_text" do
+          expect(sales_logs_outcomes_header_text(merge_request)).to eq("4 sales logs after merge")
+        end
+      end
+    end
+  end
+end
--- a/spec/jobs/process_merge_request_job_spec.rb
+++ b/spec/jobs/process_merge_request_job_spec.rb
@ -0,0 +1,65 @@
+require "rails_helper"
+
+describe ProcessMergeRequestJob do
+  let(:job) { described_class.new }
+  let(:merge_organisations_service) { instance_double(Merge::MergeOrganisationsService) }
+
+  before do
+    allow(Merge::MergeOrganisationsService).to receive(:new).and_return(merge_organisations_service)
+    allow(merge_organisations_service).to receive(:call).and_return(nil)
+  end
+
+  context "when processing a merge request" do
+    let(:organisation) { create(:organisation) }
+    let(:merging_organisation) { create(:organisation) }
+    let(:other_merging_organisation) { create(:organisation) }
+    let(:merge_request) { MergeRequest.create!(requesting_organisation: organisation, absorbing_organisation: organisation, merge_date: Time.zone.local(2022, 3, 3), total_users: 5, total_schemes: 5, total_lettings_logs: 2, total_sales_logs: 8, total_managing_agents: 2, total_stock_owners: 1, existing_absorbing_organisation: true) }
+
+    before do
+      create(:merge_request_organisation, merge_request:, merging_organisation:)
+      create(:merge_request_organisation, merge_request:, merging_organisation: other_merging_organisation)
+    end
+
+    it "calls the merge organisations service with correct arguments" do
+      expect(Merge::MergeOrganisationsService).to receive(:new).with(absorbing_organisation_id: organisation.id, merging_organisation_ids: [merging_organisation.id, other_merging_organisation.id], merge_date: Time.zone.local(2022, 3, 3), absorbing_organisation_active_from_merge_date: false)
+
+      job.perform(merge_request:)
+      expect(merge_request.reload.status).to eq("request_merged")
+    end
+
+    context "with new absorbing organisation" do
+      let(:merge_request) { MergeRequest.create!(requesting_organisation: organisation, absorbing_organisation: organisation, merge_date: Time.zone.local(2022, 3, 3), existing_absorbing_organisation: false) }
+
+      it "calls the merge organisations service with correct arguments" do
+        expect(Merge::MergeOrganisationsService).to receive(:new).with(absorbing_organisation_id: organisation.id, merging_organisation_ids: [merging_organisation.id, other_merging_organisation.id], merge_date: Time.zone.local(2022, 3, 3), absorbing_organisation_active_from_merge_date: true)
+
+        job.perform(merge_request:)
+        expect(merge_request.reload.status).to eq("request_merged")
+      end
+    end
+
+    it "clears last_failed_attempt value" do
+      merge_request.update!(last_failed_attempt: Time.zone.now)
+      job.perform(merge_request:)
+
+      expect(merge_request.reload.last_failed_attempt).to be_nil
+    end
+
+    it "sets last_failed_attempt value, sets processing to false and clears all outcomes if there's an error" do
+      allow(merge_organisations_service).to receive(:call).and_raise(ActiveRecord::Rollback)
+
+      expect(merge_request.last_failed_attempt).to be_nil
+      job.perform(merge_request:)
+
+      merge_request.reload
+      expect(merge_request.last_failed_attempt).to be_within(10.seconds).of(Time.zone.now)
+      expect(merge_request.processing).to eq(false)
+      expect(merge_request.total_users).to be_nil
+      expect(merge_request.total_schemes).to be_nil
+      expect(merge_request.total_managing_agents).to be_nil
+      expect(merge_request.total_stock_owners).to be_nil
+      expect(merge_request.total_lettings_logs).to be_nil
+      expect(merge_request.total_sales_logs).to be_nil
+    end
+  end
+end
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@ -0,0 +1,451 @@
+require "rails_helper"
+
+RSpec.describe MergeRequest, type: :model do
+  describe ".visible" do
+    let(:open_collection_period_start_date) { 1.year.ago }
+    let!(:merged_recent) { create(:merge_request, request_merged: true, merge_date: 3.months.ago) }
+    let!(:merged_old) { create(:merge_request, request_merged: true, merge_date: 18.months.ago) }
+    let!(:not_merged) { create(:merge_request, request_merged: false) }
+
+    before do
+      allow(FormHandler.instance).to receive(:start_date_of_earliest_open_collection_period).and_return(open_collection_period_start_date)
+    end
+
+    it "includes merged requests with merge dates after the open collection period start date" do
+      expect(described_class.visible).to include(merged_recent)
+    end
+
+    it "excludes merged requests with merge dates before the open collection period start date" do
+      expect(described_class.visible).not_to include(merged_old)
+    end
+
+    it "includes not_merged requests" do
+      expect(described_class.visible).to include(not_merged)
+    end
+  end
+
+  describe "#discard!" do
+    let(:merge_request) { create(:merge_request) }
+
+    it "sets the discarded_at field" do
+      merge_request.discard!
+      expect(merge_request.discarded_at).not_to be_nil
+    end
+
+    it "does not delete the record" do
+      merge_request.discard!
+      expect(merge_request).to be_persisted
+    end
+
+    it "is not visible in the visible scope" do
+      merge_request.discard!
+      expect(described_class.visible).not_to include(merge_request)
+    end
+  end
+
+  describe "#status" do
+    it "returns the correct status for deleted merge request" do
+      merge_request = build(:merge_request, id: 1, discarded_at: Time.zone.today)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:deleted]
+    end
+
+    it "returns the correct status for a merged request" do
+      merge_request = build(:merge_request, id: 1, request_merged: true)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:request_merged]
+    end
+
+    it "returns the correct status for a ready to merge request" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation), merge_date: Time.zone.today, existing_absorbing_organisation: true)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:ready_to_merge]
+    end
+
+    it "returns the correct status for a ready to merge request when existing_absorbing_organisation is false" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation), merge_date: Time.zone.today, existing_absorbing_organisation: false)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:ready_to_merge]
+    end
+
+    it "returns the merge issues if dsa is not signed for absorbing organisation" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation, with_dsa: false), merge_date: Time.zone.today, existing_absorbing_organisation: true)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:merge_issues]
+    end
+
+    it "returns the incomplete if absorbing organisation is missing" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: nil, merge_date: Time.zone.today)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:incomplete]
+    end
+
+    it "returns the incomplete if merge requests organisation is missing" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation), merge_date: Time.zone.today)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:incomplete]
+    end
+
+    it "returns the incomplete if merge date is missing" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation))
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:incomplete]
+    end
+
+    it "returns the incomplete if existing absorbing organisation is missing" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation, with_dsa: false), merge_date: Time.zone.today)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:incomplete]
+    end
+
+    it "returns processing if merge is processing" do
+      merge_request = build(:merge_request, id: 1, absorbing_organisation: create(:organisation), processing: true)
+      create(:merge_request_organisation, merge_request:)
+      expect(merge_request.status).to eq MergeRequest::STATUS[:processing]
+    end
+  end
+
+  describe "#organisations_with_users" do
+    context "when absorbing organisation has users" do
+      let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+      let(:absorbing_organisation) { create(:organisation) }
+
+      before do
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+      end
+
+      context "and some merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(1)
+          expect(merging_organisation_1.users.count).to eq(1)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_with_users.count).to eq(2)
+          expect(merge_request.organisations_with_users).to include(merging_organisation_1)
+          expect(merge_request.organisations_with_users).to include(absorbing_organisation)
+        end
+      end
+
+      context "and no merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation, with_dsa: false) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(1)
+          expect(merging_organisation_1.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_with_users.count).to eq(1)
+          expect(merge_request.organisations_with_users).to include(absorbing_organisation)
+        end
+      end
+    end
+
+    context "when absorbing organisation has no users" do
+      let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+      let(:absorbing_organisation) { create(:organisation, with_dsa: false) }
+
+      before do
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+      end
+
+      context "and some merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(merging_organisation_1.users.count).to eq(1)
+          expect(absorbing_organisation.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_with_users.count).to eq(1)
+          expect(merge_request.organisations_with_users).to include(merging_organisation_1)
+        end
+      end
+
+      context "and no merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation, with_dsa: false) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(0)
+          expect(merging_organisation_1.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_with_users.count).to eq(0)
+        end
+      end
+    end
+  end
+
+  describe "#organisations_with_schemes" do
+    let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+    let(:absorbing_organisation) { create(:organisation) }
+    let(:merging_organisation_1) { create(:organisation) }
+    let(:merging_organisation_2) { create(:organisation) }
+
+    before do
+      create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+      create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+    end
+
+    context "when absorbing organisation has schemes" do
+      before do
+        create(:scheme, owning_organisation: absorbing_organisation)
+      end
+
+      context "and some merging organisations have schemes" do
+        before do
+          create(:scheme, owning_organisation: merging_organisation_1)
+        end
+
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(1)
+          expect(merging_organisation_1.owned_schemes.count).to eq(1)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_with_schemes.count).to eq(2)
+          expect(merge_request.organisations_with_schemes).to include(merging_organisation_1)
+          expect(merge_request.organisations_with_schemes).to include(absorbing_organisation)
+        end
+      end
+
+      context "and no merging organisations have schemes" do
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(1)
+          expect(merging_organisation_1.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_with_schemes.count).to eq(1)
+          expect(merge_request.organisations_with_schemes).to include(absorbing_organisation)
+        end
+      end
+    end
+
+    context "when absorbing organisation has no schemes" do
+      context "and some merging organisations have schemes" do
+        before do
+          create(:scheme, owning_organisation: merging_organisation_1)
+        end
+
+        it "returns correct organisations with schemes" do
+          expect(merging_organisation_1.owned_schemes.count).to eq(1)
+          expect(absorbing_organisation.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_with_schemes.count).to eq(1)
+          expect(merge_request.organisations_with_schemes).to include(merging_organisation_1)
+        end
+      end
+
+      context "and no merging organisations have schemes" do
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(0)
+          expect(merging_organisation_1.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_with_schemes.count).to eq(0)
+        end
+      end
+    end
+  end
+
+  describe "#organisations_without_users" do
+    context "when absorbing organisation has users" do
+      let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+      let(:absorbing_organisation) { create(:organisation) }
+
+      before do
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+      end
+
+      context "and some merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(1)
+          expect(merging_organisation_1.users.count).to eq(1)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_without_users.count).to eq(1)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_2)
+        end
+      end
+
+      context "and no merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation, with_dsa: false) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(1)
+          expect(merging_organisation_1.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_without_users.count).to eq(2)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_1)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_2)
+        end
+      end
+    end
+
+    context "when absorbing organisation has no users" do
+      let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+      let(:absorbing_organisation) { create(:organisation, with_dsa: false) }
+
+      before do
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+        create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+      end
+
+      context "and some merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(merging_organisation_1.users.count).to eq(1)
+          expect(absorbing_organisation.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_without_users.count).to eq(2)
+          expect(merge_request.organisations_without_users).to include(absorbing_organisation)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_2)
+        end
+      end
+
+      context "and no merging organisations have users" do
+        let(:merging_organisation_1) { create(:organisation, with_dsa: false) }
+        let(:merging_organisation_2) { create(:organisation, with_dsa: false) }
+
+        it "returns correct organisations with users" do
+          expect(absorbing_organisation.users.count).to eq(0)
+          expect(merging_organisation_1.users.count).to eq(0)
+          expect(merging_organisation_2.users.count).to eq(0)
+
+          expect(merge_request.organisations_without_users.count).to eq(3)
+          expect(merge_request.organisations_without_users).to include(absorbing_organisation)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_1)
+          expect(merge_request.organisations_without_users).to include(merging_organisation_2)
+        end
+      end
+    end
+  end
+
+  describe "#organisations_without_schemes" do
+    let(:merge_request) { create(:merge_request, absorbing_organisation:) }
+    let(:absorbing_organisation) { create(:organisation) }
+    let(:merging_organisation_1) { create(:organisation) }
+    let(:merging_organisation_2) { create(:organisation) }
+
+    before do
+      create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_1)
+      create(:merge_request_organisation, merge_request:, merging_organisation: merging_organisation_2)
+    end
+
+    context "when absorbing organisation has schemes" do
+      before do
+        create(:scheme, owning_organisation: absorbing_organisation)
+      end
+
+      context "and some merging organisations have schemes" do
+        before do
+          create(:scheme, owning_organisation: merging_organisation_1)
+        end
+
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(1)
+          expect(merging_organisation_1.owned_schemes.count).to eq(1)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_without_schemes.count).to eq(1)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_2)
+        end
+      end
+
+      context "and no merging organisations have schemes" do
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(1)
+          expect(merging_organisation_1.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_without_schemes.count).to eq(2)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_1)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_2)
+        end
+      end
+    end
+
+    context "when absorbing organisation has no schemes" do
+      context "and some merging organisations have schemes" do
+        before do
+          create(:scheme, owning_organisation: merging_organisation_1)
+        end
+
+        it "returns correct organisations with schemes" do
+          expect(merging_organisation_1.owned_schemes.count).to eq(1)
+          expect(absorbing_organisation.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_without_schemes.count).to eq(2)
+          expect(merge_request.organisations_without_schemes).to include(absorbing_organisation)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_2)
+        end
+      end
+
+      context "and no merging organisations have schemes" do
+        it "returns correct organisations with schemes" do
+          expect(absorbing_organisation.owned_schemes.count).to eq(0)
+          expect(merging_organisation_1.owned_schemes.count).to eq(0)
+          expect(merging_organisation_2.owned_schemes.count).to eq(0)
+
+          expect(merge_request.organisations_without_schemes.count).to eq(3)
+          expect(merge_request.organisations_without_schemes).to include(absorbing_organisation)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_1)
+          expect(merge_request.organisations_without_schemes).to include(merging_organisation_2)
+        end
+      end
+    end
+  end
+
+  describe "relationship outcomes" do
+    let(:stock_owner1) { create(:organisation, name: "Stock owner 1") }
+    let(:stock_owner2) { create(:organisation, name: "Stock owner 2") }
+    let(:stock_owner3) { create(:organisation, name: "Stock owner 3") }
+    let(:managing_agent1) { create(:organisation, name: "Managing agent 1") }
+    let(:managing_agent2) { create(:organisation, name: "Managing agent 2") }
+    let(:absorbing_organisation) { create(:organisation, name: "Absorbing Org") }
+    let(:merging_organisations) { create_list(:organisation, 2) { |org, i| org.name = "Dummy Org #{i + 1}" } }
+    let(:merge_request) { create(:merge_request, absorbing_organisation:, merging_organisations:) }
+
+    before do
+      create(:organisation_relationship, child_organisation: absorbing_organisation, parent_organisation: stock_owner1)
+      create(:organisation_relationship, child_organisation: merging_organisations.first, parent_organisation: stock_owner2)
+      create(:organisation_relationship, child_organisation: merging_organisations.first, parent_organisation: stock_owner1)
+      create(:organisation_relationship, child_organisation: merging_organisations.first, parent_organisation: stock_owner3)
+      create(:organisation_relationship, parent_organisation: absorbing_organisation, child_organisation: managing_agent1)
+      create(:organisation_relationship, parent_organisation: absorbing_organisation, child_organisation: managing_agent2)
+      create(:organisation_relationship, parent_organisation: merging_organisations.first, child_organisation: managing_agent2)
+    end
+
+    describe "#total_stock_owners_after_merge" do
+      it "returns the correct count of stock owners after merge" do
+        expect(merge_request.total_stock_owners_after_merge).to eq(3)
+      end
+    end
+
+    describe "#total_managing_agents_after_merge" do
+      it "returns the correct count of managing agents after merge" do
+        expect(merge_request.total_managing_agents_after_merge).to eq(2)
+      end
+    end
+
+    describe "#total_stock_owners_managing_agents_label" do
+      it "returns the correct label" do
+        expect(merge_request.total_stock_owners_managing_agents_label).to eq("3 stock owners\n2 managing agents")
+      end
+    end
+  end
+end
--- a/spec/requests/merge_request_spec.rb
+++ b/spec/requests/merge_request_spec.rb
@ -0,0 +1,28 @@
+require "rails_helper"
+
+RSpec.describe MergeRequest, type: :request do
+  let(:user) { create(:user, :data_coordinator) }
+  let(:organisation) { user.organisation }
+  let(:merge_request) { create(:merge_request) }
+  let(:support_user) { create(:user, :support, organisation:) }
+  let(:page) { Capybara::Node::Simple.new(response.body) }
+
+  before do
+    allow(support_user).to receive(:need_two_factor_authentication?).and_return(false)
+    sign_in support_user
+  end
+
+  context "when deleting a merge request" do
+    it "discards the merge request" do
+      delete delete_merge_request_path(merge_request)
+      expect(merge_request.reload.discarded_at).not_to be_nil
+    end
+
+    it "redirects to the merge request list" do
+      delete delete_merge_request_path(merge_request)
+      expect(response).to redirect_to(organisations_path(tab: "merge-requests"))
+      follow_redirect!
+      expect(page).to have_content("Merge requests")
+    end
+  end
+end
--- a/spec/requests/merge_requests_controller_spec.rb
+++ b/spec/requests/merge_requests_controller_spec.rb
--- a/spec/requests/organisations_controller_spec.rb
+++ b/spec/requests/organisations_controller_spec.rb
@ -1043,6 +1043,19 @@ RSpec.describe OrganisationsController, type: :request do
          expect(page).to have_field("search", type: "search")
        end

+        it "shows the merge request list" do
+          expect(page).to have_content("Merge requests")
+        end
+
+        it "has a create new merge request button" do
+          expect(page).to have_button("Create new merge request")
+        end
+
+        it "displays 'No merge requests' when @merge_requests is empty" do
+          allow(MergeRequest).to receive(:visible).and_return(nil)
+          expect(page).to have_content("No merge requests")
+        end
+
        context "when viewing a specific organisation's lettings logs" do
          let(:parent_organisation) { create(:organisation) }
          let(:child_organisation) { create(:organisation) }
--- a/spec/views/merge_requests/show.html.erb_spec.rb
+++ b/spec/views/merge_requests/show.html.erb_spec.rb
@ -0,0 +1,93 @@
+require "rails_helper"
+
+RSpec.describe "merge_requests/show.html.erb", type: :view do
+  let(:absorbing_organisation) { create(:organisation, name: "Absorbing Org", with_dsa: false) }
+  let(:dpo_user) { create(:user, name: "DPO User", is_dpo: true, organisation: absorbing_organisation) }
+  let(:merge_request) { create(:merge_request, absorbing_organisation_id: absorbing_organisation.id, signed_dsa: false) }
+
+  before do
+    assign(:merge_request, merge_request)
+    render
+  end
+
+  it "displays the correct title" do
+    expect(rendered).to have_selector("h1.govuk-heading-l") do |h1|
+      expect(h1).to have_selector("span.govuk-caption-l", text: "Merge request")
+      expect(h1).to have_content("Absorbing Org")
+    end
+  end
+
+  it "displays the notification banner when DSA is not signed" do
+    expect(rendered).to have_selector(".govuk-notification-banner")
+    expect(rendered).to have_content("The absorbing organisation must accept the Data Sharing Agreement before merging.")
+  end
+
+  it "displays the requester details" do
+    expect(rendered).to have_selector("dt", text: "Requester")
+    expect(rendered).to have_selector("dd", text: merge_request.requester&.name || "You didn't answer this question")
+  end
+
+  it "displays the helpdesk ticket details" do
+    expect(rendered).to have_selector("dt", text: "Helpdesk ticket")
+    if merge_request.helpdesk_ticket.present?
+      expect(rendered).to have_link(merge_request.helpdesk_ticket, href: "https://dluhcdigital.atlassian.net/browse/#{merge_request.helpdesk_ticket}")
+    else
+      expect(rendered).to have_selector("dd", text: "You didn't answer this question")
+    end
+  end
+
+  it "displays the status details" do
+    expect(rendered).to have_selector("dt", text: "Status")
+    expect(rendered).to have_selector("dd", text: "Incomplete")
+  end
+
+  it "displays the absorbing organisation details" do
+    expect(rendered).to have_selector("dt", text: "Absorbing organisation")
+    expect(rendered).to have_selector("dd", text: merge_request.absorbing_organisation_name)
+  end
+
+  it "displays the merge date details" do
+    expect(rendered).to have_selector("dt", text: "Merge date")
+    expect(rendered).to have_selector("dd", text: merge_request.merge_date || "You didn't answer this question")
+  end
+
+  context "when the merge request is complete" do
+    before do
+      merge_request.update!(request_merged: true, signed_dsa: true, total_users: 10, total_schemes: 5, total_lettings_logs: 20, total_sales_logs: 30, total_stock_owners: 40, total_managing_agents: 50)
+      assign(:merge_request, merge_request)
+      render
+    end
+
+    it "has status of 'Merged'" do
+      expect(rendered).to have_selector("dd", text: "Merged")
+    end
+
+    it "displays the total users after merge details" do
+      expect(rendered).to have_selector("dt", text: "Total users after merge")
+      expect(rendered).to have_selector("dd", text: merge_request.total_users)
+    end
+
+    it "displays the total schemes after merge details" do
+      expect(rendered).to have_selector("dt", text: "Total schemes after merge")
+      expect(rendered).to have_selector("dd", text: merge_request.total_schemes)
+    end
+
+    it "displays the total logs after merge details" do
+      expect(rendered).to have_selector("dt", text: "Total logs after merge")
+      if merge_request.total_lettings_logs.present? || merge_request.total_sales_logs.present?
+        combined_text = []
+        combined_text << "#{merge_request.total_lettings_logs} lettings logs" if merge_request.total_lettings_logs.present?
+        combined_text << "#{merge_request.total_sales_logs} sales logs" if merge_request.total_sales_logs.present?
+        expect(rendered).to have_selector("dd", text: combined_text.join(""))
+      end
+    end
+
+    it "displays the total stock owners & managing agents after merge details" do
+      expect(rendered).to have_selector("dt", text: "Total stock owners & managing agents after merge")
+      combined_text = []
+      combined_text << "#{merge_request.total_stock_owners} stock owners" if merge_request.total_stock_owners.present?
+      combined_text << "#{merge_request.total_managing_agents} managing agents" if merge_request.total_managing_agents.present?
+      expect(rendered).to have_selector("dd", text: combined_text.join("\n"))
+    end
+  end
+end