diff --git a/app/views/merge/organisations.html.erb b/app/views/merge/organisations.html.erb
index d5b57c4fa..f187f16fb 100644
--- a/app/views/merge/organisations.html.erb
+++ b/app/views/merge/organisations.html.erb
@@ -1,12 +1,12 @@
 <% title = "Tell us if your organisation is merging" %>
 <% content_for :title, title %>
 
-<%= govuk_back_link href: organisation_path %>
+<%= govuk_back_link href: merge_start_organisation_path %>
 <h2 class="govuk-heading-l">Tell us if your organisation is merging</h2>
 
 <div class="govuk-grid-row">
   <div class="govuk-grid-column-two-thirds-from-desktop">
-   <p class="govuk-body">Start typing to search for your managing agent</p>
+   <p class="govuk-body">Which organisations are merging?</p>
 
 <%= form_with model: @merge, url: merge_organisations_organisation_path, method: :patch do |f| %>
   <%= f.govuk_error_summary %>
@@ -35,7 +35,10 @@
       <% end %>
     <% end %>
   <% end %>
+   <%= govuk_details(summary_text: "Can't find the managing agent you're looking for?") do %>
+      <p>List other organisations that are part of the merge but not registered on CORE.</li>
+  <% end %>
 <% end %>
 
-<%= govuk_button_link_to "Continue", merge_organisations_organisation_path, button: true %>
+<%= govuk_button_link_to "Continue", "#", button: true %>
 </div>
diff --git a/spec/requests/organisations_controller_spec.rb b/spec/requests/organisations_controller_spec.rb
index 0eef27740..c62a2d115 100644
--- a/spec/requests/organisations_controller_spec.rb
+++ b/spec/requests/organisations_controller_spec.rb
@@ -443,20 +443,62 @@ RSpec.describe OrganisationsController, type: :request do
 
       describe "#merge" do
         context "with an organisation that the user belongs to" do
-          before do
-            get "/organisations/#{organisation.id}/merge/start", headers:, params: {}
-          end
+          context "when on the start merge page" do
+            before do
+              get "/organisations/#{organisation.id}/merge/start", headers:, params: {}
+            end
 
-          it "shows the correct content" do
-            expect(page).to have_content("Tell us if your organisation is merging")
-          end
+            it "shows the correct content" do
+              expect(page).to have_content("Tell us if your organisation is merging")
+            end
 
-          it "has a correct back link" do
-            expect(page).to have_link("Back", href: "/organisations/#{organisation.id}")
+            it "has a correct back link" do
+              expect(page).to have_link("Back", href: "/organisations/#{organisation.id}")
+            end
+
+            it "has a correct start now button" do
+              expect(page).to have_link("Start now", href: "/organisations/#{organisation.id}/merge/organisations")
+            end
           end
 
-          it "has a correct start now button" do
-            expect(page).to have_link("Start now", href: "/organisations/#{organisation.id}/merge/organisations")
+          context "when on the merging organisations page" do
+            let(:params) { {} }
+
+            before do
+              organisation.update!(name: "Name 1")
+              unauthorised_organisation.update!(name: "Name 2")
+              get "/organisations/#{organisation.id}/merge/organisations", headers:, params:
+            end
+
+            it "shows the correct content" do
+              expect(page).to have_content("Which organisations are merging?")
+            end
+
+            it "has a correct back link" do
+              expect(page).to have_link("Back", href: "/organisations/#{organisation.id}/merge/start")
+            end
+
+            it "has a correct Continue button" do
+              expect(page).to have_link("Continue", href: "#")
+            end
+
+            context "and the page is loaded for the first time" do
+              let(:params) { { merge: { merging_organisation: nil } } }
+
+              it "shows current organisation in the list of merging organisations" do
+                expect(page).to have_css("table tr", text: organisation.name)
+                expect(page).not_to have_css("table tr", text: unauthorised_organisation.name)
+              end
+            end
+
+            context "and the page is loaded after adding a new merging organisation" do
+              let(:params) { { merge: { merging_organisations: organisation.id, merging_organisation: unauthorised_organisation.id } } }
+
+              it "shows current organisation and added organisation in the list of merging organisations" do
+                expect(page).to have_css("table tr", text: organisation.name)
+                expect(page).to have_css("table tr", text: unauthorised_organisation.name)
+              end
+            end
           end
         end