diff --git a/.github/workflows/review_pipeline.yml b/.github/workflows/review_pipeline.yml
index 603a8315c..52c055360 100644
--- a/.github/workflows/review_pipeline.yml
+++ b/.github/workflows/review_pipeline.yml
@@ -120,7 +120,7 @@ jobs:
           cf set-env $APP_NAME IMPORT_PAAS_INSTANCE $IMPORT_PAAS_INSTANCE
           cf set-env $APP_NAME EXPORT_PAAS_INSTANCE $EXPORT_PAAS_INSTANCE
           cf set-env $APP_NAME S3_CONFIG $S3_CONFIG
-          cf set-env $APP_NAME CSV_DOWNLOAD_PAAS_INSTANCE $CSV_DOWNLOAD_PAAS_INSTANCE
+          cf set-env $APP_NAME CSV_DOWNLOAD_PAAS_INSTANCE "dluhc-core-review-csv-bucket"
           cf set-env $APP_NAME SENTRY_DSN $SENTRY_DSN
           cf set-env $APP_NAME APP_HOST "https://dluhc-core-review-${{ github.event.pull_request.number }}.london.cloudapps.digital"
 
diff --git a/app/controllers/bulk_upload_controller.rb b/app/controllers/bulk_upload_controller.rb
index ed2ac2627..c045dc066 100644
--- a/app/controllers/bulk_upload_controller.rb
+++ b/app/controllers/bulk_upload_controller.rb
@@ -2,14 +2,14 @@ class BulkUploadController < ApplicationController
   before_action :authenticate_user!
 
   def show
-    @bulk_upload = BulkUpload.new(nil, nil)
+    @bulk_upload = LegacyBulkUpload.new(nil, nil)
     render "logs/bulk_upload"
   end
 
   def bulk_upload
     file = upload_params.tempfile
     content_type = upload_params.content_type
-    @bulk_upload = BulkUpload.new(file, content_type)
+    @bulk_upload = LegacyBulkUpload.new(file, content_type)
     @bulk_upload.process(current_user)
     if @bulk_upload.errors.present?
       render "logs/bulk_upload", status: :unprocessable_entity
diff --git a/app/controllers/bulk_upload_lettings_logs_controller.rb b/app/controllers/bulk_upload_lettings_logs_controller.rb
index 108c25fef..104c31c05 100644
--- a/app/controllers/bulk_upload_lettings_logs_controller.rb
+++ b/app/controllers/bulk_upload_lettings_logs_controller.rb
@@ -14,7 +14,7 @@ class BulkUploadLettingsLogsController < ApplicationController
   end
 
   def update
-    if form.valid?
+    if form.valid? && form.save!
       redirect_to form.next_path
     else
       render form.view_path
@@ -28,7 +28,7 @@ private
   end
 
   def in_crossover_period?
-    FormHandler.instance.forms.values.any?(&:in_crossover_period?)
+    FormHandler.instance.lettings_in_crossover_period?
   end
 
   def form
@@ -38,13 +38,15 @@ private
               when "prepare-your-file"
                 Forms::BulkUploadLettings::PrepareYourFile.new(form_params)
               when "upload-your-file"
-                Forms::BulkUploadLettings::UploadYourFile.new(form_params)
+                Forms::BulkUploadLettings::UploadYourFile.new(form_params.merge(current_user:))
+              when "checking-file"
+                Forms::BulkUploadLettings::CheckingFile.new(form_params)
               else
                 raise "Page not found for path #{params[:id]}"
               end
   end
 
   def form_params
-    params.fetch(:form, {}).permit(:year)
+    params.fetch(:form, {}).permit(:year, :file)
   end
 end
diff --git a/app/controllers/bulk_upload_sales_logs_controller.rb b/app/controllers/bulk_upload_sales_logs_controller.rb
index 81d018d4c..5f9b8d9a6 100644
--- a/app/controllers/bulk_upload_sales_logs_controller.rb
+++ b/app/controllers/bulk_upload_sales_logs_controller.rb
@@ -14,7 +14,7 @@ class BulkUploadSalesLogsController < ApplicationController
   end
 
   def update
-    if form.valid?
+    if form.valid? && form.save!
       redirect_to form.next_path
     else
       render form.view_path
@@ -28,7 +28,7 @@ private
   end
 
   def in_crossover_period?
-    FormHandler.instance.forms.values.any?(&:in_crossover_period?)
+    FormHandler.instance.sales_in_crossover_period?
   end
 
   def form
@@ -38,13 +38,15 @@ private
               when "prepare-your-file"
                 Forms::BulkUploadSales::PrepareYourFile.new(form_params)
               when "upload-your-file"
-                Forms::BulkUploadSales::UploadYourFile.new(form_params)
+                Forms::BulkUploadSales::UploadYourFile.new(form_params.merge(current_user:))
+              when "checking-file"
+                Forms::BulkUploadSales::CheckingFile.new(form_params)
               else
                 raise "Page not found for path #{params[:id]}"
               end
   end
 
   def form_params
-    params.fetch(:form, {}).permit(:year)
+    params.fetch(:form, {}).permit(:year, :file)
   end
 end
diff --git a/app/models/bulk_upload.rb b/app/models/bulk_upload.rb
index fa2a7a0e9..8b007f450 100644
--- a/app/models/bulk_upload.rb
+++ b/app/models/bulk_upload.rb
@@ -1,197 +1,13 @@
-class BulkUpload
-  include ActiveModel::Model
-  include ActiveModel::Validations
-  include ActiveModel::Conversion
+class BulkUpload < ApplicationRecord
+  enum log_type: { lettings: "lettings", sales: "sales" }
 
-  SPREADSHEET_CONTENT_TYPES = %w[
-    application/vnd.ms-excel
-    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
-  ].freeze
+  belongs_to :user
 
-  FIRST_DATA_ROW = 7
+  after_initialize :generate_identifier, unless: :identifier
 
-  def initialize(file, content_type)
-    @file = file
-    @content_type = content_type
-  end
-
-  def process(current_user)
-    return unless valid_content_type?
-
-    xlsx = Roo::Spreadsheet.open(@file, extension: :xlsx)
-    sheet = xlsx.sheet(0)
-    last_row = sheet.last_row
-    if last_row < FIRST_DATA_ROW
-      errors.add(:lettings_log_bulk_upload, "No data found")
-    else
-      data_range = FIRST_DATA_ROW..last_row
-      data_range.map do |row_num|
-        row = sheet.row(row_num)
-        # owning_organisation = Organisation.find(row[111])
-        # managing_organisation = Organisation.find(row[113])
-        lettings_log = LettingsLog.create!(
-          owning_organisation: current_user.organisation,
-          managing_organisation: current_user.organisation,
-          created_by: current_user,
-        )
-        map_row(row).each do |attr_key, attr_val|
-          _update = lettings_log.update(attr_key => attr_val)
-        rescue ArgumentError
-          # TODO: determine what we want to do when bulk upload contains totally invalid data for a field.
-        end
-      end
-    end
-  end
-
-  def valid_content_type?
-    if SPREADSHEET_CONTENT_TYPES.include?(@content_type)
-      true
-    else
-      errors.add(:lettings_log_bulk_upload, "Invalid file type")
-      false
-    end
-  end
-
-  def map_row(row)
-    {
-      lettype: row[1],
-      # reg_num_la_core_code: row[3],
-      # managementgroup: row[4],
-      # schemecode: row[5],
-      # firstletting: row[6],
-      tenancycode: row[7],
-      startertenancy: row[8],
-      tenancy: row[9],
-      tenancyother: row[10],
-      # tenancyduration: row[11],
-      hhmemb: hhmemb(row),
-      age1: row[12],
-      age2: row[13],
-      age3: row[14],
-      age4: row[15],
-      age5: row[16],
-      age6: row[17],
-      age7: row[18],
-      age8: row[19],
-      sex1: row[20],
-      sex2: row[21],
-      sex3: row[22],
-      sex4: row[23],
-      sex5: row[24],
-      sex6: row[25],
-      sex7: row[26],
-      sex8: row[27],
-      relat2: row[28],
-      relat3: row[29],
-      relat4: row[30],
-      relat5: row[31],
-      relat6: row[32],
-      relat7: row[33],
-      relat8: row[34],
-      ecstat1: row[35],
-      ecstat2: row[36],
-      ecstat3: row[37],
-      ecstat4: row[38],
-      ecstat5: row[39],
-      ecstat6: row[40],
-      ecstat7: row[41],
-      ecstat8: row[42],
-      ethnic: row[43],
-      national: row[44],
-      armedforces: row[45],
-      reservist: row[46],
-      preg_occ: row[47],
-      hb: row[48],
-      benefits: row[49],
-      net_income_known: row[50].present? ? 1 : nil,
-      earnings: row[50],
-      # increfused: row[51],
-      reason: row[52],
-      reasonother: row[53],
-      underoccupation_benefitcap: row[54],
-      housingneeds_a: row[55],
-      housingneeds_b: row[56],
-      housingneeds_c: row[57],
-      housingneeds_f: row[58],
-      housingneeds_g: row[59],
-      housingneeds_h: row[60],
-      prevten: row[61],
-      prevloc: row[62],
-      # prevpco_unknown: row[65],
-      layear: row[66],
-      waityear: row[67],
-      homeless: row[68],
-      reasonpref: row[69],
-      rp_homeless: row[70],
-      rp_insan_unsat: row[71],
-      rp_medwel: row[72],
-      rp_hardship: row[73],
-      rp_dontknow: row[74],
-      cbl: row[75],
-      chr: row[76],
-      cap: row[77],
-      # referral_source: row[78],
-      period: row[79],
-      brent: row[80],
-      scharge: row[81],
-      pscharge: row[82],
-      supcharg: row[83],
-      tcharge: row[84],
-      # tcharge_care_homes: row[85],
-      # no_rent_or_charge: row[86],
-      hbrentshortfall: row[87],
-      tshortfall: row[88],
-      voiddate: row[89].to_s + row[90].to_s + row[91].to_s,
-      majorrepairs: row[92].present? ? "1" : nil,
-      mrcdate: row[92].to_s + row[93].to_s + row[94].to_s,
-      # supported_scheme: row[95],
-      startdate: date_time(row[98], row[97], row[96]),
-      # startdate_day: row[96],
-      # startdate_month: row[97],
-      # startdate_year: row[98],
-      offered: row[99],
-      # property_reference: row[100],
-      beds: row[101],
-      unittype_gn: row[102],
-      builtype: row[103],
-      wchair: row[104],
-      property_relet: row[105],
-      rsnvac: row[106],
-      la: row[107],
-      # row[110] removed
-      # row[111] is owning organisation used above
-      # username: row[112],
-      # row[113] is managing organisation used above
-      leftreg: row[114],
-      # uprn: row[115],
-      incfreq: row[116],
-      # sheltered_accom: row[117],
-      illness: row[118],
-      illness_type_1: row[119],
-      illness_type_2: row[120],
-      illness_type_3: row[121],
-      illness_type_4: row[122],
-      illness_type_8: row[123],
-      illness_type_5: row[124],
-      illness_type_6: row[125],
-      illness_type_7: row[126],
-      illness_type_9: row[127],
-      illness_type_10: row[128],
-      # london_affordable: row[129],
-      rent_type: row[130],
-      irproduct_other: row[131],
-      # data_protection: row[132],
-      declaration: 1,
-    }
-  end
-
-  def date_time(year, month, day)
-    return unless year && month && day
-
-    Time.zone.local("20#{year}", month.to_s, day.to_s)
-  end
+private
 
-  def hhmemb(row)
-    [14, 15, 16, 17, 18, 19, 20].count { |idx| row[idx].present? }
+  def generate_identifier
+    self.identifier ||= SecureRandom.uuid
   end
 end
diff --git a/app/models/form.rb b/app/models/form.rb
index 022b9c261..fceb48b65 100644
--- a/app/models/form.rb
+++ b/app/models/form.rb
@@ -231,10 +231,6 @@ class Form
     end
   end
 
-  def in_crossover_period?(now: Time.zone.now)
-    ((end_date - 3.months) < now) && (now < end_date)
-  end
-
   def inspect
     "#<#{self.class} @type=#{type} @name=#{name}>"
   end
diff --git a/app/models/form_handler.rb b/app/models/form_handler.rb
index 03de5e290..69b05859e 100644
--- a/app/models/form_handler.rb
+++ b/app/models/form_handler.rb
@@ -63,6 +63,20 @@ class FormHandler
     form_mappings[current_collection_start_year - year]
   end
 
+  def in_crossover_period?(now: Time.zone.now)
+    lettings_in_crossover_period?(now:) || sales_in_crossover_period?(now:)
+  end
+
+  def lettings_in_crossover_period?(now: Time.zone.now)
+    forms = lettings_forms.values
+    forms.count { |form| form.start_date < now && now < form.end_date } > 1
+  end
+
+  def sales_in_crossover_period?(now: Time.zone.now)
+    forms = sales_forms.values
+    forms.count { |form| form.start_date < now && now < form.end_date } > 1
+  end
+
 private
 
   def get_all_forms
diff --git a/app/models/forms/bulk_upload_lettings/checking_file.rb b/app/models/forms/bulk_upload_lettings/checking_file.rb
new file mode 100644
index 000000000..8cd9ee696
--- /dev/null
+++ b/app/models/forms/bulk_upload_lettings/checking_file.rb
@@ -0,0 +1,27 @@
+module Forms
+  module BulkUploadLettings
+    class CheckingFile
+      include ActiveModel::Model
+      include ActiveModel::Attributes
+      include Rails.application.routes.url_helpers
+
+      attribute :year, :integer
+
+      def view_path
+        "bulk_upload_lettings_logs/forms/checking_file"
+      end
+
+      def back_path
+        bulk_upload_lettings_log_path(id: "start")
+      end
+
+      def year_combo
+        "#{year}/#{year + 1 - 2000}"
+      end
+
+      def save!
+        true
+      end
+    end
+  end
+end
diff --git a/app/models/forms/bulk_upload_lettings/prepare_your_file.rb b/app/models/forms/bulk_upload_lettings/prepare_your_file.rb
index 684ba1437..4e2c9b9a6 100644
--- a/app/models/forms/bulk_upload_lettings/prepare_your_file.rb
+++ b/app/models/forms/bulk_upload_lettings/prepare_your_file.rb
@@ -31,10 +31,14 @@ module Forms
         "#{year}/#{year + 1 - 2000}"
       end
 
+      def save!
+        true
+      end
+
     private
 
       def in_crossover_period?
-        FormHandler.instance.forms.values.any?(&:in_crossover_period?)
+        FormHandler.instance.lettings_in_crossover_period?
       end
     end
   end
diff --git a/app/models/forms/bulk_upload_lettings/upload_your_file.rb b/app/models/forms/bulk_upload_lettings/upload_your_file.rb
index 1415ffe19..0f6325b75 100644
--- a/app/models/forms/bulk_upload_lettings/upload_your_file.rb
+++ b/app/models/forms/bulk_upload_lettings/upload_your_file.rb
@@ -1,3 +1,5 @@
+require "shellwords"
+
 module Forms
   module BulkUploadLettings
     class UploadYourFile
@@ -6,6 +8,11 @@ module Forms
       include Rails.application.routes.url_helpers
 
       attribute :year, :integer
+      attribute :file
+      attribute :current_user
+
+      validates :file, presence: true
+      validate :validate_file_is_csv
 
       def view_path
         "bulk_upload_lettings_logs/forms/upload_your_file"
@@ -14,6 +21,49 @@ module Forms
       def back_path
         bulk_upload_lettings_log_path(id: "prepare-your-file", form: { year: })
       end
+
+      def year_combo
+        "#{year}/#{year + 1 - 2000}"
+      end
+
+      def next_path
+        bulk_upload_lettings_log_path(id: "checking-file", form: { year: })
+      end
+
+      def save!
+        bulk_upload = BulkUpload.create!(
+          user: current_user,
+          log_type: BulkUpload.log_types[:lettings],
+          year:,
+        )
+
+        if upload_enabled?
+          storage_service.write_file(bulk_upload.identifier, File.read(file.path))
+        end
+
+        true
+      end
+
+    private
+
+      def upload_enabled?
+        FeatureToggle.upload_enabled?
+      end
+
+      def storage_service
+        @storage_service ||= Storage::S3Service.new(Configuration::PaasConfigurationService.new, ENV["CSV_DOWNLOAD_PAAS_INSTANCE"])
+      end
+
+      def validate_file_is_csv
+        return unless file
+
+        argv = %W[file --brief --mime-type -- #{file.path}]
+        output = `#{argv.shelljoin}`
+
+        unless output.match?(/text\/csv|text\/plain/)
+          errors.add(:file, :not_csv)
+        end
+      end
     end
   end
 end
diff --git a/app/models/forms/bulk_upload_lettings/year.rb b/app/models/forms/bulk_upload_lettings/year.rb
index 9fa17b19e..68db63978 100644
--- a/app/models/forms/bulk_upload_lettings/year.rb
+++ b/app/models/forms/bulk_upload_lettings/year.rb
@@ -27,6 +27,10 @@ module Forms
         bulk_upload_lettings_log_path(id: "prepare-your-file", form: { year: })
       end
 
+      def save!
+        true
+      end
+
     private
 
       def possible_years
diff --git a/app/models/forms/bulk_upload_sales/checking_file.rb b/app/models/forms/bulk_upload_sales/checking_file.rb
new file mode 100644
index 000000000..a37be3ccb
--- /dev/null
+++ b/app/models/forms/bulk_upload_sales/checking_file.rb
@@ -0,0 +1,27 @@
+module Forms
+  module BulkUploadSales
+    class CheckingFile
+      include ActiveModel::Model
+      include ActiveModel::Attributes
+      include Rails.application.routes.url_helpers
+
+      attribute :year, :integer
+
+      def view_path
+        "bulk_upload_sales_logs/forms/checking_file"
+      end
+
+      def back_path
+        bulk_upload_sales_log_path(id: "start")
+      end
+
+      def year_combo
+        "#{year}/#{year + 1 - 2000}"
+      end
+
+      def save!
+        true
+      end
+    end
+  end
+end
diff --git a/app/models/forms/bulk_upload_sales/prepare_your_file.rb b/app/models/forms/bulk_upload_sales/prepare_your_file.rb
index da017dbbd..5c7e775ef 100644
--- a/app/models/forms/bulk_upload_sales/prepare_your_file.rb
+++ b/app/models/forms/bulk_upload_sales/prepare_your_file.rb
@@ -31,10 +31,14 @@ module Forms
         "#{year}/#{year + 1 - 2000}"
       end
 
+      def save!
+        true
+      end
+
     private
 
       def in_crossover_period?
-        FormHandler.instance.forms.values.any?(&:in_crossover_period?)
+        FormHandler.instance.sales_in_crossover_period?
       end
     end
   end
diff --git a/app/models/forms/bulk_upload_sales/upload_your_file.rb b/app/models/forms/bulk_upload_sales/upload_your_file.rb
index 3d421e9f1..7211d67a7 100644
--- a/app/models/forms/bulk_upload_sales/upload_your_file.rb
+++ b/app/models/forms/bulk_upload_sales/upload_your_file.rb
@@ -1,3 +1,5 @@
+require "shellwords"
+
 module Forms
   module BulkUploadSales
     class UploadYourFile
@@ -6,6 +8,11 @@ module Forms
       include Rails.application.routes.url_helpers
 
       attribute :year, :integer
+      attribute :file
+      attribute :current_user
+
+      validates :file, presence: true
+      validate :validate_file_is_csv
 
       def view_path
         "bulk_upload_sales_logs/forms/upload_your_file"
@@ -14,6 +21,49 @@ module Forms
       def back_path
         bulk_upload_sales_log_path(id: "prepare-your-file", form: { year: })
       end
+
+      def year_combo
+        "#{year}/#{year + 1 - 2000}"
+      end
+
+      def next_path
+        bulk_upload_sales_log_path(id: "checking-file", form: { year: })
+      end
+
+      def save!
+        bulk_upload = BulkUpload.create!(
+          user: current_user,
+          log_type: BulkUpload.log_types[:sales],
+          year:,
+        )
+
+        if upload_enabled?
+          storage_service.write_file(bulk_upload.identifier, File.read(file.path))
+        end
+
+        true
+      end
+
+    private
+
+      def upload_enabled?
+        !Rails.env.development?
+      end
+
+      def storage_service
+        @storage_service ||= Storage::S3Service.new(Configuration::PaasConfigurationService.new, ENV["CSV_DOWNLOAD_PAAS_INSTANCE"])
+      end
+
+      def validate_file_is_csv
+        return unless file
+
+        argv = %W[file --brief --mime-type -- #{file.path}]
+        output = `#{argv.shelljoin}`
+
+        unless output.match?(/text\/csv|text\/plain/)
+          errors.add(:file, :not_csv)
+        end
+      end
     end
   end
 end
diff --git a/app/models/forms/bulk_upload_sales/year.rb b/app/models/forms/bulk_upload_sales/year.rb
index 361061990..2d4b48e4a 100644
--- a/app/models/forms/bulk_upload_sales/year.rb
+++ b/app/models/forms/bulk_upload_sales/year.rb
@@ -27,6 +27,10 @@ module Forms
         bulk_upload_sales_log_path(id: "prepare-your-file", form: { year: })
       end
 
+      def save!
+        true
+      end
+
     private
 
       def possible_years
diff --git a/app/models/legacy_bulk_upload.rb b/app/models/legacy_bulk_upload.rb
new file mode 100644
index 000000000..e80321d04
--- /dev/null
+++ b/app/models/legacy_bulk_upload.rb
@@ -0,0 +1,197 @@
+class LegacyBulkUpload
+  include ActiveModel::Model
+  include ActiveModel::Validations
+  include ActiveModel::Conversion
+
+  SPREADSHEET_CONTENT_TYPES = %w[
+    application/vnd.ms-excel
+    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
+  ].freeze
+
+  FIRST_DATA_ROW = 7
+
+  def initialize(file, content_type)
+    @file = file
+    @content_type = content_type
+  end
+
+  def process(current_user)
+    return unless valid_content_type?
+
+    xlsx = Roo::Spreadsheet.open(@file, extension: :xlsx)
+    sheet = xlsx.sheet(0)
+    last_row = sheet.last_row
+    if last_row < FIRST_DATA_ROW
+      errors.add(:lettings_log_bulk_upload, "No data found")
+    else
+      data_range = FIRST_DATA_ROW..last_row
+      data_range.map do |row_num|
+        row = sheet.row(row_num)
+        # owning_organisation = Organisation.find(row[111])
+        # managing_organisation = Organisation.find(row[113])
+        lettings_log = LettingsLog.create!(
+          owning_organisation: current_user.organisation,
+          managing_organisation: current_user.organisation,
+          created_by: current_user,
+        )
+        map_row(row).each do |attr_key, attr_val|
+          _update = lettings_log.update(attr_key => attr_val)
+        rescue ArgumentError
+          # TODO: determine what we want to do when bulk upload contains totally invalid data for a field.
+        end
+      end
+    end
+  end
+
+  def valid_content_type?
+    if SPREADSHEET_CONTENT_TYPES.include?(@content_type)
+      true
+    else
+      errors.add(:lettings_log_bulk_upload, "Invalid file type")
+      false
+    end
+  end
+
+  def map_row(row)
+    {
+      lettype: row[1],
+      # reg_num_la_core_code: row[3],
+      # managementgroup: row[4],
+      # schemecode: row[5],
+      # firstletting: row[6],
+      tenancycode: row[7],
+      startertenancy: row[8],
+      tenancy: row[9],
+      tenancyother: row[10],
+      # tenancyduration: row[11],
+      hhmemb: hhmemb(row),
+      age1: row[12],
+      age2: row[13],
+      age3: row[14],
+      age4: row[15],
+      age5: row[16],
+      age6: row[17],
+      age7: row[18],
+      age8: row[19],
+      sex1: row[20],
+      sex2: row[21],
+      sex3: row[22],
+      sex4: row[23],
+      sex5: row[24],
+      sex6: row[25],
+      sex7: row[26],
+      sex8: row[27],
+      relat2: row[28],
+      relat3: row[29],
+      relat4: row[30],
+      relat5: row[31],
+      relat6: row[32],
+      relat7: row[33],
+      relat8: row[34],
+      ecstat1: row[35],
+      ecstat2: row[36],
+      ecstat3: row[37],
+      ecstat4: row[38],
+      ecstat5: row[39],
+      ecstat6: row[40],
+      ecstat7: row[41],
+      ecstat8: row[42],
+      ethnic: row[43],
+      national: row[44],
+      armedforces: row[45],
+      reservist: row[46],
+      preg_occ: row[47],
+      hb: row[48],
+      benefits: row[49],
+      net_income_known: row[50].present? ? 1 : nil,
+      earnings: row[50],
+      # increfused: row[51],
+      reason: row[52],
+      reasonother: row[53],
+      underoccupation_benefitcap: row[54],
+      housingneeds_a: row[55],
+      housingneeds_b: row[56],
+      housingneeds_c: row[57],
+      housingneeds_f: row[58],
+      housingneeds_g: row[59],
+      housingneeds_h: row[60],
+      prevten: row[61],
+      prevloc: row[62],
+      # prevpco_unknown: row[65],
+      layear: row[66],
+      waityear: row[67],
+      homeless: row[68],
+      reasonpref: row[69],
+      rp_homeless: row[70],
+      rp_insan_unsat: row[71],
+      rp_medwel: row[72],
+      rp_hardship: row[73],
+      rp_dontknow: row[74],
+      cbl: row[75],
+      chr: row[76],
+      cap: row[77],
+      # referral_source: row[78],
+      period: row[79],
+      brent: row[80],
+      scharge: row[81],
+      pscharge: row[82],
+      supcharg: row[83],
+      tcharge: row[84],
+      # tcharge_care_homes: row[85],
+      # no_rent_or_charge: row[86],
+      hbrentshortfall: row[87],
+      tshortfall: row[88],
+      voiddate: row[89].to_s + row[90].to_s + row[91].to_s,
+      majorrepairs: row[92].present? ? "1" : nil,
+      mrcdate: row[92].to_s + row[93].to_s + row[94].to_s,
+      # supported_scheme: row[95],
+      startdate: date_time(row[98], row[97], row[96]),
+      # startdate_day: row[96],
+      # startdate_month: row[97],
+      # startdate_year: row[98],
+      offered: row[99],
+      # property_reference: row[100],
+      beds: row[101],
+      unittype_gn: row[102],
+      builtype: row[103],
+      wchair: row[104],
+      property_relet: row[105],
+      rsnvac: row[106],
+      la: row[107],
+      # row[110] removed
+      # row[111] is owning organisation used above
+      # username: row[112],
+      # row[113] is managing organisation used above
+      leftreg: row[114],
+      # uprn: row[115],
+      incfreq: row[116],
+      # sheltered_accom: row[117],
+      illness: row[118],
+      illness_type_1: row[119],
+      illness_type_2: row[120],
+      illness_type_3: row[121],
+      illness_type_4: row[122],
+      illness_type_8: row[123],
+      illness_type_5: row[124],
+      illness_type_6: row[125],
+      illness_type_7: row[126],
+      illness_type_9: row[127],
+      illness_type_10: row[128],
+      # london_affordable: row[129],
+      rent_type: row[130],
+      irproduct_other: row[131],
+      # data_protection: row[132],
+      declaration: 1,
+    }
+  end
+
+  def date_time(year, month, day)
+    return unless year && month && day
+
+    Time.zone.local("20#{year}", month.to_s, day.to_s)
+  end
+
+  def hhmemb(row)
+    [14, 15, 16, 17, 18, 19, 20].count { |idx| row[idx].present? }
+  end
+end
diff --git a/app/views/bulk_upload_lettings_logs/forms/checking_file.html.erb b/app/views/bulk_upload_lettings_logs/forms/checking_file.html.erb
new file mode 100644
index 000000000..f38178b7e
--- /dev/null
+++ b/app/views/bulk_upload_lettings_logs/forms/checking_file.html.erb
@@ -0,0 +1,28 @@
+<% content_for :before_content do %>
+  <%= govuk_back_link href: @form.back_path %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= form_with model: @form, scope: :form, url: bulk_upload_lettings_log_path(id: "prepare-your-file"), method: :patch do |f| %>
+      <%= f.hidden_field :year %>
+
+      <span class="govuk-caption-l">Upload lettings logs in bulk (<%= @form.year_combo %>)</span>
+      <h1 class="govuk-heading-l">We’re checking the file</h1>
+
+      <h2 class="govuk-heading-m">Once this is done, we’ll email you the outcome.</h2>
+
+      <p class="govuk-body">
+        We’re checking for any missing data, issues or errors. Depending on the file size, this could take a few minutes.
+      </p>
+
+      <p class="govuk-body">
+        If there are errors we will email you a link to view all the errors.
+      </p>
+
+      <p class="govuk-body">
+        If there are no errors we will email you to let you know the upload is complete and that your logs have been created.
+      </p>
+    <% end %>
+  </div>
+</div>
diff --git a/app/views/bulk_upload_lettings_logs/forms/upload_your_file.html.erb b/app/views/bulk_upload_lettings_logs/forms/upload_your_file.html.erb
index 86dde8ae2..8964438de 100644
--- a/app/views/bulk_upload_lettings_logs/forms/upload_your_file.html.erb
+++ b/app/views/bulk_upload_lettings_logs/forms/upload_your_file.html.erb
@@ -2,16 +2,24 @@
   <%= govuk_back_link href: @form.back_path %>
 <% end %>
 
-<%= form_with model: @form, scope: :form, url: bulk_upload_lettings_log_path(id: "upload-your-file"), method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= form_with model: @form, scope: :form, url: bulk_upload_lettings_log_path(id: "upload-your-file"), method: :patch do |f| %>
+      <%= f.hidden_field :year %>
 
-  <div>
-    Upload your file goes here
-  </div>
+      <%= f.govuk_error_summary %>
 
-  <div>
-    year selected <%= @form.year %>
-  </div>
+      <span class="govuk-caption-l">Upload lettings logs in bulk (<%= @form.year_combo %>)</span>
+      <h1 class="govuk-heading-l">Upload your file</h1>
 
-  <%= f.govuk_submit %>
-<% end %>
+      <p class="govuk-body">
+        All data must be complete and formatted correctly (CSV <strong>only</strong>) - if not, we will reject the entire file.
+      </p>
+
+      <%= f.govuk_file_field :file,
+        label: { text: "Upload file" } %>
+
+      <%= f.govuk_submit "Upload" %>
+    <% end %>
+  </div>
+</div>
diff --git a/app/views/bulk_upload_sales_logs/forms/checking_file.html.erb b/app/views/bulk_upload_sales_logs/forms/checking_file.html.erb
new file mode 100644
index 000000000..b729abc09
--- /dev/null
+++ b/app/views/bulk_upload_sales_logs/forms/checking_file.html.erb
@@ -0,0 +1,28 @@
+<% content_for :before_content do %>
+  <%= govuk_back_link href: @form.back_path %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= form_with model: @form, scope: :form, url: bulk_upload_sales_log_path(id: "prepare-your-file"), method: :patch do |f| %>
+      <%= f.hidden_field :year %>
+
+      <span class="govuk-caption-l">Upload sales logs in bulk (<%= @form.year_combo %>)</span>
+      <h1 class="govuk-heading-l">We’re checking the file</h1>
+
+      <h2 class="govuk-heading-m">Once this is done, we’ll email you the outcome.</h2>
+
+      <p class="govuk-body">
+        We’re checking for any missing data, issues or errors. Depending on the file size, this could take a few minutes.
+      </p>
+
+      <p class="govuk-body">
+        If there are errors we will email you a link to view all the errors.
+      </p>
+
+      <p class="govuk-body">
+        If there are no errors we will email you to let you know the upload is complete and that your logs have been created.
+      </p>
+    <% end %>
+  </div>
+</div>
diff --git a/app/views/bulk_upload_sales_logs/forms/upload_your_file.html.erb b/app/views/bulk_upload_sales_logs/forms/upload_your_file.html.erb
index a178339e8..36e7240dc 100644
--- a/app/views/bulk_upload_sales_logs/forms/upload_your_file.html.erb
+++ b/app/views/bulk_upload_sales_logs/forms/upload_your_file.html.erb
@@ -2,16 +2,24 @@
   <%= govuk_back_link href: @form.back_path %>
 <% end %>
 
-<%= form_with model: @form, scope: :form, url: bulk_upload_sales_log_path(id: "upload-your-file"), method: :patch do |f| %>
-  <%= f.govuk_error_summary %>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= form_with model: @form, scope: :form, url: bulk_upload_sales_log_path(id: "upload-your-file"), method: :patch do |f| %>
+      <%= f.hidden_field :year %>
 
-  <div>
-    Upload your file goes here
-  </div>
+      <%= f.govuk_error_summary %>
 
-  <div>
-    year selected <%= @form.year %>
-  </div>
+      <span class="govuk-caption-l">Upload sales logs in bulk (<%= @form.year_combo %>)</span>
+      <h1 class="govuk-heading-l">Upload your file</h1>
 
-  <%= f.govuk_submit %>
-<% end %>
+      <p class="govuk-body">
+        All data must be complete and formatted correctly (CSV <strong>only</strong>) - if not, we will reject the entire file.
+      </p>
+
+      <%= f.govuk_file_field :file,
+        label: { text: "Upload file" } %>
+
+      <%= f.govuk_submit "Upload" %>
+    <% end %>
+  </div>
+</div>
diff --git a/app/views/logs/bulk_upload.html.erb b/app/views/logs/bulk_upload.html.erb
index 0f1b544f7..6d06af7a3 100644
--- a/app/views/logs/bulk_upload.html.erb
+++ b/app/views/logs/bulk_upload.html.erb
@@ -1,6 +1,6 @@
 <% content_for :title, "Bulk upload" %>
 
-<%= form_for @bulk_upload, url: bulk_upload_lettings_logs_path, method: "post" do |f| %>
+<%= form_for @bulk_upload, scope: :bulk_upload, url: bulk_upload_lettings_logs_path, method: "post" do |f| %>
   <%= f.govuk_error_summary %>
 
   <%= f.govuk_file_field :lettings_log_bulk_upload,
diff --git a/config/initializers/feature_toggle.rb b/config/initializers/feature_toggle.rb
index 8fc2cd7d4..b315ff723 100644
--- a/config/initializers/feature_toggle.rb
+++ b/config/initializers/feature_toggle.rb
@@ -26,4 +26,8 @@ class FeatureToggle
   def self.bulk_upload_logs?
     !Rails.env.production?
   end
+
+  def self.upload_enabled?
+    !Rails.env.development?
+  end
 end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 6c2d7db46..4f6f6c5b5 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -49,6 +49,16 @@ en:
           attributes:
             year:
               blank: You must select a collection period to upload for
+        forms/bulk_upload_lettings/upload_your_file:
+          attributes:
+            file:
+              blank: Select which file to upload
+              not_csv: Your file must be in CSV format
+        forms/bulk_upload_sales/upload_your_file:
+          attributes:
+            file:
+              blank: Select which file to upload
+              not_csv: Your file must be in CSV format
 
   activerecord:
     errors:
diff --git a/db/migrate/20221128130843_create_bulk_uploads.rb b/db/migrate/20221128130843_create_bulk_uploads.rb
new file mode 100644
index 000000000..adb3385b5
--- /dev/null
+++ b/db/migrate/20221128130843_create_bulk_uploads.rb
@@ -0,0 +1,14 @@
+class CreateBulkUploads < ActiveRecord::Migration[7.0]
+  def change
+    create_table :bulk_uploads do |t|
+      t.references :user
+      t.text :log_type, null: false
+      t.integer :year, null: false
+      t.uuid :identifier, null: false
+
+      t.timestamps
+    end
+
+    add_index :bulk_uploads, :identifier, unique: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 70daf01b5..4f7d267ce 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -14,6 +14,17 @@ ActiveRecord::Schema[7.0].define(version: 2022_12_06_081127) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
+  create_table "bulk_uploads", force: :cascade do |t|
+    t.bigint "user_id"
+    t.text "log_type", null: false
+    t.integer "year", null: false
+    t.uuid "identifier", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["identifier"], name: "index_bulk_uploads_on_identifier", unique: true
+    t.index ["user_id"], name: "index_bulk_uploads_on_user_id"
+  end
+
   create_table "data_protection_confirmations", force: :cascade do |t|
     t.bigint "organisation_id"
     t.bigint "data_protection_officer_id"
diff --git a/spec/features/bulk_upload_lettings_logs_spec.rb b/spec/features/bulk_upload_lettings_logs_spec.rb
index e9a05b07d..3df49fe44 100644
--- a/spec/features/bulk_upload_lettings_logs_spec.rb
+++ b/spec/features/bulk_upload_lettings_logs_spec.rb
@@ -3,13 +3,26 @@ require "rails_helper"
 RSpec.describe "Bulk upload lettings log" do
   let(:user) { create(:user) }
 
+  let(:stub_file_upload) do
+    vcap_services = { "aws-s3-bucket" => {} }
+    mock_storage_service = instance_double("S3Service")
+
+    allow(ENV).to receive(:[])
+    allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services.to_json)
+
+    allow(Storage::S3Service).to receive(:new).and_return(mock_storage_service)
+    allow(mock_storage_service).to receive(:write_file)
+  end
+
   before do
+    stub_file_upload
     sign_in user
   end
 
+  # rubocop:disable RSpec/AnyInstance
   context "when during crossover period" do
     it "shows journey with year option" do
-      Timecop.freeze(2023, 6, 1) do
+      Timecop.freeze(2022, 6, 1) do
         visit("/lettings-logs")
         expect(page).to have_link("Upload lettings logs in bulk")
         click_link("Upload lettings logs in bulk")
@@ -30,9 +43,30 @@ RSpec.describe "Bulk upload lettings log" do
         click_button("Continue")
 
         expect(page).to have_content("Upload your file")
+        click_button("Upload")
+
+        allow_any_instance_of(Forms::BulkUploadLettings::UploadYourFile).to receive(:`).and_return("not a csv")
+
+        expect(page).to have_content("Select which file to upload")
+        attach_file "file", file_fixture("2021_22_lettings_bulk_upload.xlsx")
+        click_button("Upload")
+
+        allow_any_instance_of(Forms::BulkUploadLettings::UploadYourFile).to receive(:`).and_return("text/csv")
+
+        expect(page).to have_content("Your file must be in CSV format")
+        attach_file "file", file_fixture("blank_bulk_upload_sales.csv")
+        expect {
+          click_button("Upload")
+        }.to change(BulkUpload, :count).by(1)
+
+        expect(page).to have_content("Once this is done")
+        click_link("Back")
+
+        expect(page).to have_content("Upload lettings logs in bulk")
       end
     end
   end
+  # rubocop:enable RSpec/AnyInstance
 
   context "when not it crossover period" do
     it "shows journey with year option" do
diff --git a/spec/features/bulk_upload_sales_logs_spec.rb b/spec/features/bulk_upload_sales_logs_spec.rb
index 67187ff78..b69b6e237 100644
--- a/spec/features/bulk_upload_sales_logs_spec.rb
+++ b/spec/features/bulk_upload_sales_logs_spec.rb
@@ -3,13 +3,26 @@ require "rails_helper"
 RSpec.describe "Bulk upload sales log" do
   let(:user) { create(:user) }
 
+  let(:stub_file_upload) do
+    vcap_services = { "aws-s3-bucket" => {} }
+    mock_storage_service = instance_double("S3Service")
+
+    allow(ENV).to receive(:[])
+    allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services.to_json)
+
+    allow(Storage::S3Service).to receive(:new).and_return(mock_storage_service)
+    allow(mock_storage_service).to receive(:write_file)
+  end
+
   before do
+    stub_file_upload
     sign_in user
   end
 
+  # rubocop:disable RSpec/AnyInstance
   context "when during crossover period" do
     it "shows journey with year option" do
-      Timecop.freeze(2023, 6, 1) do
+      Timecop.freeze(2023, 5, 1) do
         visit("/sales-logs")
         expect(page).to have_link("Upload sales logs in bulk")
         click_link("Upload sales logs in bulk")
@@ -30,9 +43,30 @@ RSpec.describe "Bulk upload sales log" do
         click_button("Continue")
 
         expect(page).to have_content("Upload your file")
+        click_button("Upload")
+
+        allow_any_instance_of(Forms::BulkUploadSales::UploadYourFile).to receive(:`).and_return("not a csv")
+
+        expect(page).to have_content("Select which file to upload")
+        attach_file "file", file_fixture("2021_22_lettings_bulk_upload.xlsx")
+        click_button("Upload")
+
+        allow_any_instance_of(Forms::BulkUploadSales::UploadYourFile).to receive(:`).and_return("text/csv")
+
+        expect(page).to have_content("Your file must be in CSV format")
+        attach_file "file", file_fixture("blank_bulk_upload_sales.csv")
+        expect {
+          click_button("Upload")
+        }.to change(BulkUpload, :count).by(1)
+
+        expect(page).to have_content("Once this is done")
+        click_link("Back")
+
+        expect(page).to have_content("Upload sales logs in bulk")
       end
     end
   end
+  # rubocop:enable RSpec/AnyInstance
 
   context "when not it crossover period" do
     it "shows journey with year option" do
diff --git a/spec/fixtures/files/blank_bulk_upload_sales.csv b/spec/fixtures/files/blank_bulk_upload_sales.csv
new file mode 100644
index 000000000..4771d9fc9
--- /dev/null
+++ b/spec/fixtures/files/blank_bulk_upload_sales.csv
@@ -0,0 +1,118 @@
+Question,What is the purchaser code?,What is the day of the sale completion date? - DD,What is the month of the sale completion date? - MM,What is the year of the sale completion date? - YY,[BLANK],Was the buyer interviewed for any of the answers you will provide on this log?,Age of Buyer 1,Age of Buyer 2 or Person 2,Age of Person 3,Age of Person 4,Age of Person 5,Age of Person 6,Gender identity of Buyer 1,Gender identity of Buyer 2 or Person 2,Gender identity of Person 3,Gender identity of Person 4,Gender identity of Person 5,Gender identity of Person 6,Person 2's relationship to lead tenant,Person 3's relationship to lead tenant,Person 4's relationship to lead tenant,Person 5's relationship to lead tenant,Person 6's relationship to lead tenant,Working situation of Buyer 1,Working situation of Buyer 2 or Person 2,Working situation of Person 3,Working situation of Person 4,Working situation of Person 5,Working situation of Person 6,What is the buyer 1's ethnic group?,What is buyer 1's nationality?,What is buyer 1's gross annual income?,What is buyer 2's gross annual income?,Was buyer 1's income used for a mortgage application?,Was buyer 2's income used for a mortgage application?,"What is the total amount the buyers had in savings before they paid any deposit for the property?
+
+To the nearest £10",Have any of the buyers previously owned a property?,[BLANK],What was buyer 1's previous tenure?,What is the local authority of buyer 1's last settled home,Part 1 of postcode of buyer 1's last settled home,Part 2 of postcode of buyer 1's last settled home,Do you know the postcode of buyer 1's last settled home?,Was the buyer registered with their PRP (HA)?,Was the buyer registered with the local authority?,Was the buyer registered with a Help to Buy agent?,Was the buyer registered with another PRP (HA)?,Does anyone in the household consider themselves to have a disability?,Does anyone in the household use a wheelchair?,How many bedrooms does the property have?,What type of unit is the property?,Which type of building is the property?,What is the local authority of the property?,Part 1 of postcode of property,Part 2 of postcode of property,Is the property built or adapted to wheelchair-user standards?,What is the type of shared ownership sale?,"Is this a resale?
+
+Shared ownership","What is the day of the practical completion or handover date? - DD
+
+Shared ownership","What is the month of the practical completion or handover date? - MM
+
+Shared ownership","What is the year of the practical completion or handover date? - YY
+
+Shared ownership","What is the day of the exchange of contracts date? - DD
+
+Shared ownership","What is the month of the exchange of contracts date? - MM
+
+Shared ownership","What is the year of the exchange of contracts date? - YY
+
+Shared ownership","Was the household re-housed under a local authority nominations agreement?
+
+Shared ownership","How many bedrooms did the buyer's previous property have?
+
+Shared ownership","What was the type of the buyer's previous property?
+
+Shared ownership","What was the full purchase price?
+
+Shared ownership","What was the initial percentage equity stake purchased?
+
+Shared ownership","What is the mortgage amount?
+
+Shared ownership","Does this include any extra borrowing?
+
+Shared ownership","How much was the cash deposit paid on the property?
+
+Shared ownership","How much cash discount was given through Social Homebuy?
+
+Shared ownership","What is the basic monthly rent?
+
+Shared ownership","What are the total monthly leasehold charges for the property?
+
+Shared ownership",What is the type of discounted ownership sale?,"What was the full purchase price?
+
+Discounted ownership","What was the amount of any loan, grant, discount or subsidy given?
+
+Discounted ownership","What was the percentage discount?
+
+Discounted ownership","What is the mortgage amount?
+
+Discounted ownership","Does this include any extra borrowing?
+
+Discounted ownership","How much was the cash deposit paid on the property?
+
+Discounted ownership","What are the total monthly leasehold charges for the property?
+
+Discounted ownership",What is the type of outright sale?,"What is the 'other' type of outright sale?
+
+Outright sale",[BLANK],"What is the full purchase price?
+
+Outright sale","What is the mortgage amount?
+
+Outright sale","Does this include any extra borrowing?
+
+Outright sale","How much was the cash deposit paid on the property?
+
+Outright sale","What are the total monthly leasehold charges for the property?
+
+Outright sale","Which organisation owned this property before the sale?
+
+Organisation's CORE ID",Username,BLANK,Has the buyer ever served in the UK Armed Forces and for how long?,[BLANK],Are any of the buyers a spouse or civil partner of a UK Armed Forces regular who died in service within the last 2 years?,"What is the name of the mortgage lender?
+
+Shared ownership","What is the name of the 'other' mortgage lender?
+
+Shared ownership","What is the name of the mortgage lender?
+
+Discounted ownership","What is the name of the 'other' mortgage lender?
+
+Discounted ownership","What is the name of the mortgage lender?
+
+Outright sale","What is the name of the 'other' mortgage lender?
+
+Outright sale",Were the buyers receiving any of these housing-related benefits immediately before buying this property?,"What is the length of the mortgage in years?
+
+Shared ownership","What is the length of the mortgage in years?
+
+Discounted ownership","What is the length of the mortgage in years?
+
+Outright sale","How long have the buyers been living in the property before the purchase?
+
+Discounted ownership",Are there more than two joint purchasers of this property?,"How long have the buyers been living in the property before the purchase?
+
+Shared ownership",Is this a staircasing transaction?,Data Protection question,Was this purchase made through an ownership scheme?,"Is the buyer a company?
+
+Outright sale",Will the buyers live in the property?,Is this a joint purchase?,Will buyer 1 live in the property?,Will buyer 2 live in the property?,"Besides the buyers, how many people live in the property?","What percentage of the property has been bought in this staircasing transaction?
+
+Shared ownership","What percentage of the property does the buyer now own in total?
+
+Shared ownership","What was the rent type of the buyer's previous property?
+
+Shared ownership","Was a mortgage used for the purchase of this property?
+
+Shared ownership","Was a mortgage used for the purchase of this property?
+
+Discounted ownership","Was a mortgage used for the purchase of this property?
+
+Outright sale"
+Values,Max 9 digits,1 - 31,1 - 12,19 - 23,,1 or null,"15 - 110
+or R",1 - 110 or R,,,,,"M, F, X or R",,,,,,"P, C, X or R",,,,,0 - 10,,,,,,1 - 19,"12 -13, 17 -19",0 - 99999,,1 or 2,1 or 2,0 - 999990,1 - 3,,1 - 7 or 9,ONS CODE - E + 9 digits,XXX(X),XXX,1 or null,,,,,1 - 3,1 - 3,1 - 9,1 - 4 or 9,1 or 2,ONS CODE E + 9 digits,XXX(X),XXX,1 - 3,"2, 16, 18, 24, 28 or 30-31",1 or 2,1 - 31,1 - 12,19 - 23,1 - 31,1 - 12,19 - 23,1 - 3,1 - 9,1 - 4 or 9,0 - 999999,0 - 100,0 - 999999,1 - 3,0 - 999999,,0 - 999.99,,"8, 9, 14, 21, 22, 27 or 29",0 - 999999,,0 - 100,0 - 999999,1 - 3,0 - 999999,0 - 999.99,10 or 12,,,0 - 999999,,1-3,0 - 999999,0-999.99,Up to 7 digits,Username of CORE account this sales log should be assigned to,,3 - 8,,4 - 7,1 - 40,,1 - 40,,1 - 40,,1 - 4, Integer <=60, Integer <=60, Integer <=60, Integer <=80,1 - 3, Integer <=80,1 - 3,1,1 - 3,1 - 2,1 - 2,1 - 2,1 - 2,1 - 2,0 - 5,1 - 100,1 - 100,1-3 or 9-10,1 - 2,1 - 2,1 - 2
+Can be Null?,No,,,,,No,No,"If fields 14, 19 and 25 are all also null","If fields 15, 20 and 26 are all also null","If fields 16, 21 and 27 are all also null","If fields 17, 22 and 28 are all also null","If fields 18, 23 and 29 are all also null",No,"If fields 8, 19 and 25 are all also null","If fields 9, 20 and 26 are also null","If fields 10, 21 and 27 are all also null","If fields 11, 22 and 28 are all also null","If fields 12, 23 and 29 are all also null","If fields 8, 14 and 25 are all also null","If fields 9, 15 and 26 are all also null","If fields 10, 16 and 27 are all also null","If fields 11, 17 and 28 are all also null","If fields 12, 18 and 29 are all also null",If field 6 = 1,"If fields 8, 14 and 19 are all also null","If fields 9, 15 and 20 are all also null","If fields 10, 16 and 21 are all also null","If fields 11, 17 and 22 are all also null","If fields 12, 18 and 23 are all also null",If field 6 =  1,,,If field 116 = 2,If field 32  is null,If field 116 = 2,If field 6 = 1,,,If field 6 = 1,No,If field 43 = 1,,If fields 41 and 42 BOTH have valid entries,Yes,,,,If field 6 = 1,,No,,,,,,,If field 113 = 2 or 3,,,,,,,,,"If field 113 = 2 or 3
+OR
+field 39 = 3 - 7 or 9",,If field 113 = 2 or 3,,,,,"If field 57 is null, 2, 16, 24 or 28",If field 113 = 2 or 3,,If field 113 = 1 or 3,If field 76 is null,"If field 76 is null, 9 or 14","If field 76 is null, 8, 21 or 22",If field 113 = 1 or 3,,,,If field 113 = 1 or 2,If field 84 is null or 10,,If field 113 = 1 or 2,,,,,No,Yes,,No,,No,If field 113 = 2 or 3,"If field 113 = 2 or 3
+OR
+If field 98 is not 40",If field 113 = 1 or 3,"If field 113 = 1 or 3
+OR
+If field 100 is not 40",If field 113 = 1 or 2,"If field 113 = 1 or 2
+OR
+If field 102 is not 40",No,If field 113 = 2 or 3,If field 113 = 1 or 3,If field 113 = 1 or 2,If field 113 = 1 or 3,If field 116 = 2,If field 113 = 2 or 3,If field 113 = 2 or 3,No,No,If field 113 = 1 or 2,If field 113 = 1 or 2,No,No,If field 116 = 2,No,If field 113 = 2 or 3,If field 113 = 2 or 3,"If field 113 = 1 or 2
+OR
+If field 39 = 3 - 9",If field 113 = 2 or 3,If field 113 = 1 or 3,If field 113 = 1 or 2
+Bulk upload format and duplicate check,Yes,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
+Field number,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125
diff --git a/spec/fixtures/files/excel_as_csv.csv b/spec/fixtures/files/excel_as_csv.csv
new file mode 100644
index 000000000..f1b7de0bb
Binary files /dev/null and b/spec/fixtures/files/excel_as_csv.csv differ
diff --git a/spec/models/form_handler_spec.rb b/spec/models/form_handler_spec.rb
index f9d03aa36..fe979ac27 100644
--- a/spec/models/form_handler_spec.rb
+++ b/spec/models/form_handler_spec.rb
@@ -153,4 +153,20 @@ RSpec.describe FormHandler do
     expect(form.type).to eq("lettings")
     expect(form.start_date.year).to eq(2022)
   end
+
+  # rubocop:disable RSpec/PredicateMatcher
+  describe "#in_crossover_period?" do
+    context "when not in overlapping period" do
+      it "returns false" do
+        expect(form_handler.in_crossover_period?(now: Date.new(2022, 1, 1))).to be_falsey
+      end
+    end
+
+    context "when in overlapping period" do
+      it "returns true" do
+        expect(form_handler.in_crossover_period?(now: Date.new(2022, 6, 1))).to be_truthy
+      end
+    end
+  end
+  # rubocop:enable RSpec/PredicateMatcher
 end
diff --git a/spec/models/form_spec.rb b/spec/models/form_spec.rb
index a9a0c9b40..110a521e2 100644
--- a/spec/models/form_spec.rb
+++ b/spec/models/form_spec.rb
@@ -237,40 +237,6 @@ RSpec.describe Form, type: :model do
     end
   end
 
-  describe "#in_crossover_period?" do
-    context "when now not specified" do
-      context "when after end period" do
-        subject(:form) { described_class.new(nil, 2022, [], "sales") }
-
-        it "returns false" do
-          Timecop.freeze(2023, 8, 1) do
-            expect(form).not_to be_in_crossover_period
-          end
-        end
-      end
-
-      context "when during crossover" do
-        subject(:form) { described_class.new(nil, 2022, [], "sales") }
-
-        it "returns true" do
-          Timecop.freeze(2023, 6, 1) do
-            expect(form).to be_in_crossover_period
-          end
-        end
-      end
-
-      context "when before crossover" do
-        subject(:form) { described_class.new(nil, 2022, [], "sales") }
-
-        it "returns false" do
-          Timecop.freeze(2023, 1, 1) do
-            expect(form).not_to be_in_crossover_period
-          end
-        end
-      end
-    end
-  end
-
   describe "when creating a lettings log", :aggregate_failures do
     it "creates a valid lettings form" do
       form = described_class.new("spec/fixtures/forms/2021_2022.json")
diff --git a/spec/models/forms/bulk_upload_lettings/upload_your_file_spec.rb b/spec/models/forms/bulk_upload_lettings/upload_your_file_spec.rb
new file mode 100644
index 000000000..1199201fa
--- /dev/null
+++ b/spec/models/forms/bulk_upload_lettings/upload_your_file_spec.rb
@@ -0,0 +1,47 @@
+require "rails_helper"
+
+RSpec.describe Forms::BulkUploadLettings::UploadYourFile do
+  subject(:form) { described_class.new(year:, file:, current_user:) }
+
+  let(:year) { 2022 }
+  let(:actual_file) { File.open(file_fixture("blank_bulk_upload_sales.csv")) }
+  let(:file) { ActionDispatch::Http::UploadedFile.new(tempfile: actual_file) }
+  let(:current_user) { create(:user) }
+  let(:mock_storage_service) { instance_double("S3Service") }
+
+  before do
+    vcap_services = { "aws-s3-bucket" => {} }
+
+    allow(ENV).to receive(:[])
+    allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services.to_json)
+
+    allow(Storage::S3Service).to receive(:new).and_return(mock_storage_service)
+    allow(mock_storage_service).to receive(:write_file)
+  end
+
+  describe "#save" do
+    it "persists a BulkUpload" do
+      expect { form.save! }.to change(BulkUpload, :count).by(1)
+    end
+
+    it "persists a BulkUpload correctly" do
+      form.save!
+
+      bulk_upload = BulkUpload.last
+
+      expect(bulk_upload.user).to eql(current_user)
+      expect(bulk_upload.log_type).to eql("lettings")
+      expect(bulk_upload.year).to eql(year)
+      expect(bulk_upload.identifier).to be_present
+    end
+
+    it "uploads file via storage service" do
+      form.save!
+
+      bulk_upload = BulkUpload.last
+
+      expect(Storage::S3Service).to have_received(:new)
+      expect(mock_storage_service).to have_received(:write_file).with(bulk_upload.identifier, actual_file.read)
+    end
+  end
+end
diff --git a/spec/models/forms/bulk_upload_sales/upload_your_file_spec.rb b/spec/models/forms/bulk_upload_sales/upload_your_file_spec.rb
new file mode 100644
index 000000000..1b11b0f82
--- /dev/null
+++ b/spec/models/forms/bulk_upload_sales/upload_your_file_spec.rb
@@ -0,0 +1,47 @@
+require "rails_helper"
+
+RSpec.describe Forms::BulkUploadSales::UploadYourFile do
+  subject(:form) { described_class.new(year:, file:, current_user:) }
+
+  let(:year) { 2022 }
+  let(:actual_file) { File.open(file_fixture("blank_bulk_upload_sales.csv")) }
+  let(:file) { ActionDispatch::Http::UploadedFile.new(tempfile: actual_file) }
+  let(:current_user) { create(:user) }
+  let(:mock_storage_service) { instance_double("S3Service") }
+
+  before do
+    vcap_services = { "aws-s3-bucket" => {} }
+
+    allow(ENV).to receive(:[])
+    allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services.to_json)
+
+    allow(Storage::S3Service).to receive(:new).and_return(mock_storage_service)
+    allow(mock_storage_service).to receive(:write_file)
+  end
+
+  describe "#save" do
+    it "persists a BulkUpload" do
+      expect { form.save! }.to change(BulkUpload, :count).by(1)
+    end
+
+    it "persists a BulkUpload correctly" do
+      form.save!
+
+      bulk_upload = BulkUpload.last
+
+      expect(bulk_upload.user).to eql(current_user)
+      expect(bulk_upload.log_type).to eql("sales")
+      expect(bulk_upload.year).to eql(year)
+      expect(bulk_upload.identifier).to be_present
+    end
+
+    it "uploads file via storage service" do
+      form.save!
+
+      bulk_upload = BulkUpload.last
+
+      expect(Storage::S3Service).to have_received(:new)
+      expect(mock_storage_service).to have_received(:write_file).with(bulk_upload.identifier, actual_file.read)
+    end
+  end
+end
diff --git a/spec/requests/bulk_upload_controller_spec.rb b/spec/requests/bulk_upload_controller_spec.rb
index bc75dbe84..fc3afd21c 100644
--- a/spec/requests/bulk_upload_controller_spec.rb
+++ b/spec/requests/bulk_upload_controller_spec.rb
@@ -45,7 +45,7 @@ RSpec.describe BulkUploadController, type: :request do
       end
 
       it "returns a page with a file upload form" do
-        expect(response.body).to match(/<input id="bulk-upload-lettings-log-bulk-upload-field" class="govuk-file-upload"/)
+        expect(response.body).to match(/<input id="legacy-bulk-upload-lettings-log-bulk-upload-field" class="govuk-file-upload"/)
         expect(response.body).to match(/<button type="submit" formnovalidate="formnovalidate" class="govuk-button"/)
       end
     end
diff --git a/spec/requests/bulk_upload_lettings_logs_controller_spec.rb b/spec/requests/bulk_upload_lettings_logs_controller_spec.rb
index 3b59d449d..8b9d091ca 100644
--- a/spec/requests/bulk_upload_lettings_logs_controller_spec.rb
+++ b/spec/requests/bulk_upload_lettings_logs_controller_spec.rb
@@ -23,7 +23,7 @@ RSpec.describe BulkUploadLettingsLogsController, type: :request do
 
     context "when in crossover period" do
       it "redirects to /year" do
-        Timecop.freeze(2023, 6, 1) do
+        Timecop.freeze(2022, 6, 1) do
           get "/lettings-logs/bulk-upload-logs/start", params: {}
 
           expect(response).to redirect_to("/lettings-logs/bulk-upload-logs/year")