diff --git a/app/services/merge/merge_organisations_service.rb b/app/services/merge/merge_organisations_service.rb
index 7610a6e4e..85988cf3c 100644
--- a/app/services/merge/merge_organisations_service.rb
+++ b/app/services/merge/merge_organisations_service.rb
@@ -6,14 +6,16 @@ class Merge::MergeOrganisationsService
 
   def call
     merge_organisation_details
-    merge_rent_periods
-    merge_organisation_relationships
-    merge_users
-    merge_schemes_and_locations
-    merge_lettings_logs
-    merge_sales_logs
-    mark_organisations_as_merged
+    @merging_organisations.each do |merging_organisation|
+      merge_rent_periods(merging_organisation)
+      merge_organisation_relationships(merging_organisation)
+      merge_users(merging_organisation)
+      merge_schemes_and_locations(merging_organisation)
+      merge_lettings_logs(merging_organisation)
+      merge_sales_logs(merging_organisation)
+    end
     @absorbing_organisation.save!
+    mark_organisations_as_merged
   end
 
 private
@@ -22,78 +24,66 @@ private
     @absorbing_organisation.holds_own_stock = merge_boolean_organisation_attribute("holds_own_stock")
   end
 
-  def merge_rent_periods
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.rent_periods.each do |rent_period|
-        @absorbing_organisation.organisation_rent_periods << OrganisationRentPeriod.new(rent_period:) unless @absorbing_organisation.rent_periods.include?(rent_period)
-      end
+  def merge_rent_periods(merging_organisation)
+    merging_organisation.rent_periods.each do |rent_period|
+      @absorbing_organisation.organisation_rent_periods << OrganisationRentPeriod.new(rent_period:) unless @absorbing_organisation.rent_periods.include?(rent_period)
     end
   end
 
-  def merge_organisation_relationships
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.parent_organisation_relationships.each do |parent_organisation_relationship|
-        if parent_relationship_exists_on_absorbing_organisation?(parent_organisation_relationship)
-          parent_organisation_relationship.destroy!
-        else
-          parent_organisation_relationship.update!(child_organisation: @absorbing_organisation)
-        end
+  def merge_organisation_relationships(merging_organisation)
+    merging_organisation.parent_organisation_relationships.each do |parent_organisation_relationship|
+      if parent_relationship_exists_on_absorbing_organisation?(parent_organisation_relationship)
+        parent_organisation_relationship.destroy!
+      else
+        parent_organisation_relationship.update!(child_organisation: @absorbing_organisation)
       end
-      merging_organisation.child_organisation_relationships.each do |child_organisation_relationship|
-        if child_relationship_exists_on_absorbing_organisation?(child_organisation_relationship)
-          child_organisation_relationship.destroy!
-        else
-          child_organisation_relationship.update!(parent_organisation: @absorbing_organisation)
-        end
+    end
+    merging_organisation.child_organisation_relationships.each do |child_organisation_relationship|
+      if child_relationship_exists_on_absorbing_organisation?(child_organisation_relationship)
+        child_organisation_relationship.destroy!
+      else
+        child_organisation_relationship.update!(parent_organisation: @absorbing_organisation)
       end
     end
   end
 
-  def merge_users
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.users.update_all(organisation_id: @absorbing_organisation.id)
-    end
+  def merge_users(merging_organisation)
+    merging_organisation.users.update_all(organisation_id: @absorbing_organisation.id)
   end
 
-  def merge_schemes_and_locations
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.owned_schemes.each do |scheme|
-        next if scheme.deactivated?
+  def merge_schemes_and_locations(merging_organisation)
+    merging_organisation.owned_schemes.each do |scheme|
+      next if scheme.deactivated?
 
-        new_scheme = Scheme.create!(scheme.attributes.except("id", "owning_organisation_id").merge(owning_organisation: @absorbing_organisation))
-        scheme.locations.each do |location|
-          new_scheme.locations << Location.new(location.attributes.except("id", "scheme_id")) unless location.deactivated?
-        end
-        SchemeDeactivationPeriod.create!(scheme:, deactivation_date: Time.zone.now)
+      new_scheme = Scheme.create!(scheme.attributes.except("id", "owning_organisation_id").merge(owning_organisation: @absorbing_organisation))
+      scheme.locations.each do |location|
+        new_scheme.locations << Location.new(location.attributes.except("id", "scheme_id")) unless location.deactivated?
       end
+      SchemeDeactivationPeriod.create!(scheme:, deactivation_date: Time.zone.now)
     end
   end
 
-  def merge_lettings_logs
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.owned_lettings_logs.after_date(Time.zone.today).each do |lettings_log|
-        if lettings_log.scheme.present?
-          scheme_to_set = @absorbing_organisation.owned_schemes.find_by(service_name: lettings_log.scheme.service_name)
-          location_to_set = scheme_to_set.locations.find_by(name: lettings_log.location&.name, postcode: lettings_log.location&.postcode)
+  def merge_lettings_logs(merging_organisation)
+    merging_organisation.owned_lettings_logs.after_date(Time.zone.today).each do |lettings_log|
+      if lettings_log.scheme.present?
+        scheme_to_set = @absorbing_organisation.owned_schemes.find_by(service_name: lettings_log.scheme.service_name)
+        location_to_set = scheme_to_set.locations.find_by(name: lettings_log.location&.name, postcode: lettings_log.location&.postcode)
 
-          lettings_log.scheme = scheme_to_set if scheme_to_set.present?
-          lettings_log.location = location_to_set if location_to_set.present?
-        end
-        lettings_log.owning_organisation = @absorbing_organisation
-        lettings_log.save!
-      end
-      merging_organisation.managed_lettings_logs.after_date(Time.zone.today).each do |lettings_log|
-        lettings_log.managing_organisation = @absorbing_organisation
-        lettings_log.save!
+        lettings_log.scheme = scheme_to_set if scheme_to_set.present?
+        lettings_log.location = location_to_set if location_to_set.present?
       end
+      lettings_log.owning_organisation = @absorbing_organisation
+      lettings_log.save!
+    end
+    merging_organisation.managed_lettings_logs.after_date(Time.zone.today).each do |lettings_log|
+      lettings_log.managing_organisation = @absorbing_organisation
+      lettings_log.save!
     end
   end
 
-  def merge_sales_logs
-    @merging_organisations.each do |merging_organisation|
-      merging_organisation.owned_sales_logs.after_date(Time.zone.today).each do |sales_log|
-        sales_log.update(owning_organisation: @absorbing_organisation)
-      end
+  def merge_sales_logs(merging_organisation)
+    merging_organisation.owned_sales_logs.after_date(Time.zone.today).each do |sales_log|
+      sales_log.update(owning_organisation: @absorbing_organisation)
     end
   end