diff --git a/app/components/lettings_log_summary_component.html.erb b/app/components/lettings_log_summary_component.html.erb
index 89fddad20..7686e3559 100644
--- a/app/components/lettings_log_summary_component.html.erb
+++ b/app/components/lettings_log_summary_component.html.erb
@@ -33,13 +33,13 @@
           <% if log.owning_organisation %>
             <div class="app-metadata__item">
               <dt class="app-metadata__term">Owned by</dt>
-              <dd class="app-metadata__definition"><%= log.owning_organisation&.name %></dd>
+              <dd class="app-metadata__definition"><%= log.owning_organisation&.label %></dd>
             </div>
           <% end %>
           <% if log.managing_organisation %>
             <div class="app-metadata__item">
               <dt class="app-metadata__term">Managed by</dt>
-              <dd class="app-metadata__definition"><%= log.managing_organisation&.name %></dd>
+              <dd class="app-metadata__definition"><%= log.managing_organisation&.label %></dd>
             </div>
           <% end %>
         </dl>
diff --git a/app/components/sales_log_summary_component.html.erb b/app/components/sales_log_summary_component.html.erb
index 60a2a7eb5..1d376aa4a 100644
--- a/app/components/sales_log_summary_component.html.erb
+++ b/app/components/sales_log_summary_component.html.erb
@@ -26,13 +26,13 @@
           <% if log.owning_organisation %>
             <div class="app-metadata__item">
               <dt class="app-metadata__term">Owned by</dt>
-              <dd class="app-metadata__definition"><%= log.owning_organisation&.name %></dd>
+              <dd class="app-metadata__definition"><%= log.owning_organisation&.label %></dd>
             </div>
           <% end %>
           <% if log.managing_organisation %>
             <div class="app-metadata__item">
               <dt class="app-metadata__term">Reported by</dt>
-              <dd class="app-metadata__definition"><%= log.managing_organisation&.name %></dd>
+              <dd class="app-metadata__definition"><%= log.managing_organisation&.label %></dd>
             </div>
           <% end %>
         </dl>
diff --git a/app/controllers/organisations_controller.rb b/app/controllers/organisations_controller.rb
index 357a5f272..138baa78c 100644
--- a/app/controllers/organisations_controller.rb
+++ b/app/controllers/organisations_controller.rb
@@ -15,9 +15,9 @@ class OrganisationsController < ApplicationController
     redirect_to organisation_path(current_user.organisation) unless current_user.support?
 
     all_organisations = Organisation.order(:name)
-    @pagy, @organisations = pagy(filtered_collection(all_organisations, search_term))
+    @pagy, @organisations = pagy(filtered_collection(all_organisations.visible, search_term))
     @searched = search_term.presence
-    @total_count = all_organisations.size
+    @total_count = all_organisations.visible.size
   end
 
   def schemes
@@ -117,7 +117,6 @@ class OrganisationsController < ApplicationController
   end
 
   def update
-    selected_rent_periods = rent_period_params[:rent_periods].compact_blank
     if (current_user.data_coordinator? && org_params[:active].nil?) || current_user.support?
       if @organisation.update(org_params)
         case org_params[:active]
@@ -136,11 +135,14 @@ class OrganisationsController < ApplicationController
         else
           flash[:notice] = I18n.t("organisation.updated")
         end
-        used_rent_periods = @organisation.lettings_logs.pluck(:period).uniq.compact.map(&:to_s)
-        rent_periods_to_delete = rent_period_params[:all_rent_periods] - selected_rent_periods - used_rent_periods
-        OrganisationRentPeriod.transaction do
-          selected_rent_periods.each { |period| OrganisationRentPeriod.create(organisation: @organisation, rent_period: period) }
-          OrganisationRentPeriod.where(organisation: @organisation, rent_period: rent_periods_to_delete).destroy_all
+        if rent_period_params[:rent_periods].present?
+          selected_rent_periods = rent_period_params[:rent_periods].compact_blank
+          used_rent_periods = @organisation.lettings_logs.pluck(:period).uniq.compact.map(&:to_s)
+          rent_periods_to_delete = rent_period_params[:all_rent_periods] - selected_rent_periods - used_rent_periods
+          OrganisationRentPeriod.transaction do
+            selected_rent_periods.each { |period| OrganisationRentPeriod.create(organisation: @organisation, rent_period: period) }
+            OrganisationRentPeriod.where(organisation: @organisation, rent_period: rent_periods_to_delete).destroy_all
+          end
         end
         redirect_to details_organisation_path(@organisation)
       else
@@ -152,6 +154,17 @@ class OrganisationsController < ApplicationController
     end
   end
 
+  def delete
+    authorize @organisation
+
+    @organisation.discard!
+    redirect_to organisations_path, notice: I18n.t("notification.organisation_deleted", name: @organisation.name)
+  end
+
+  def delete_confirmation
+    authorize @organisation
+  end
+
   def lettings_logs
     organisation_logs = LettingsLog.visible.filter_by_organisation(@organisation).filter_by_years_or_nil(FormHandler.instance.years_of_available_lettings_forms)
     unpaginated_filtered_logs = filter_manager.filtered_logs(organisation_logs, search_term, session_filters)
@@ -306,7 +319,7 @@ private
   end
 
   def authenticate_scope!
-    if %w[create new lettings_logs sales_logs download_lettings_csv email_lettings_csv email_sales_csv download_sales_csv].include? action_name
+    if %w[create new lettings_logs sales_logs download_lettings_csv email_lettings_csv email_sales_csv download_sales_csv delete_confirmation delete].include? action_name
       head :unauthorized and return unless current_user.support?
     elsif current_user.organisation != @organisation && !current_user.support?
       render_not_found
diff --git a/app/helpers/organisations_helper.rb b/app/helpers/organisations_helper.rb
index 7d37b9289..75d5869fa 100644
--- a/app/helpers/organisations_helper.rb
+++ b/app/helpers/organisations_helper.rb
@@ -19,7 +19,7 @@ module OrganisationsHelper
       { name: "Owns housing stock", value: organisation.holds_own_stock ? "Yes" : "No", editable: false },
       { name: "Rent periods", value: organisation.rent_period_labels, editable: true, format: :bullet },
       { name: "Data Sharing Agreement" },
-      { name: "Status", value: status_tag(organisation.status), editable: false },
+      { name: "Status", value: status_tag(organisation.status) + delete_organisation_text(organisation), editable: false },
     ]
   end
 
@@ -39,9 +39,19 @@ module OrganisationsHelper
     end
   end
 
+  def delete_organisation_text(organisation)
+    if organisation.active == false && current_user.support? && !OrganisationPolicy.new(current_user, organisation).delete?
+      "<div class=\"app-!-colour-muted\">This organisation was active in an open or editable collection year, and cannot be deleted.</div>".html_safe
+    end
+  end
+
   def rent_periods_with_checked_attr(checked_periods: nil)
     RentPeriod.rent_period_mappings.each_with_object({}) do |(period_code, period_value), result|
       result[period_code] = period_value.merge(checked: checked_periods.nil? || checked_periods.include?(period_code))
     end
   end
+
+  def delete_organisation_link(organisation)
+    govuk_button_link_to "Delete this organisation", delete_confirmation_organisation_path(organisation), warning: true
+  end
 end
diff --git a/app/helpers/schemes_helper.rb b/app/helpers/schemes_helper.rb
index 1cc89d3d5..f96f9e4c8 100644
--- a/app/helpers/schemes_helper.rb
+++ b/app/helpers/schemes_helper.rb
@@ -20,10 +20,10 @@ module SchemesHelper
   end
 
   def owning_organisation_options(current_user)
-    all_orgs = Organisation.all.map { |org| OpenStruct.new(id: org.id, name: org.name) }
+    all_orgs = Organisation.visible.map { |org| OpenStruct.new(id: org.id, name: org.name) }
     user_org = [OpenStruct.new(id: current_user.organisation_id, name: current_user.organisation.name)]
-    stock_owners = current_user.organisation.stock_owners.map { |org| OpenStruct.new(id: org.id, name: org.name) }
-    merged_organisations = current_user.organisation.absorbed_organisations.merged_during_open_collection_period.map { |org| OpenStruct.new(id: org.id, name: org.name) }
+    stock_owners = current_user.organisation.stock_owners.visible.map { |org| OpenStruct.new(id: org.id, name: org.name) }
+    merged_organisations = current_user.organisation.absorbed_organisations.visible.merged_during_open_collection_period.map { |org| OpenStruct.new(id: org.id, name: org.name) }
     current_user.support? ? all_orgs : user_org + stock_owners + merged_organisations
   end
 
diff --git a/app/models/form/lettings/questions/managing_organisation.rb b/app/models/form/lettings/questions/managing_organisation.rb
index ea85ff207..81847876e 100644
--- a/app/models/form/lettings/questions/managing_organisation.rb
+++ b/app/models/form/lettings/questions/managing_organisation.rb
@@ -17,7 +17,8 @@ class Form::Lettings::Questions::ManagingOrganisation < ::Form::Question
     return opts unless log
 
     if log.managing_organisation.present?
-      opts = opts.merge({ log.managing_organisation.id => log.managing_organisation.name })
+      org_value = log.managing_organisation.label
+      opts = opts.merge({ log.managing_organisation.id => org_value })
     end
 
     if user.support?
@@ -31,14 +32,14 @@ class Form::Lettings::Questions::ManagingOrganisation < ::Form::Question
     end
 
     orgs = if user.support?
-             log.owning_organisation.managing_agents.filter_by_active
+             log.owning_organisation.managing_agents.visible.filter_by_active
            elsif user.organisation.absorbed_organisations.include?(log.owning_organisation)
-             user.organisation.managing_agents.filter_by_active + log.owning_organisation.managing_agents.filter_by_active
+             user.organisation.managing_agents.visible.filter_by_active + log.owning_organisation.managing_agents.visible.filter_by_active # here
            else
-             user.organisation.managing_agents.filter_by_active
+             user.organisation.managing_agents.visible.filter_by_active
            end
 
-    user.organisation.absorbed_organisations.each do |absorbed_org|
+    user.organisation.absorbed_organisations.visible.each do |absorbed_org|
       opts[absorbed_org.id] = "#{absorbed_org.name} (inactive as of #{absorbed_org.merge_date.to_fs(:govuk_date)})"
     end
 
@@ -72,7 +73,10 @@ class Form::Lettings::Questions::ManagingOrganisation < ::Form::Question
   end
 
   def answer_label(log, _current_user = nil)
-    Organisation.find_by(id: log.managing_organisation_id)&.name
+    organisation = Organisation.find_by(id: log.managing_organisation_id)
+    return unless organisation
+
+    organisation.label
   end
 
 private
diff --git a/app/models/form/lettings/questions/stock_owner.rb b/app/models/form/lettings/questions/stock_owner.rb
index 6ce0e5496..daa042004 100644
--- a/app/models/form/lettings/questions/stock_owner.rb
+++ b/app/models/form/lettings/questions/stock_owner.rb
@@ -17,7 +17,8 @@ class Form::Lettings::Questions::StockOwner < ::Form::Question
     return answer_opts unless log
 
     if log.owning_organisation_id.present?
-      answer_opts[log.owning_organisation.id] = log.owning_organisation.name
+      org_value = log.owning_organisation.label
+      answer_opts[log.owning_organisation.id] = org_value
     end
 
     recently_absorbed_organisations = user.organisation.absorbed_organisations.merged_during_open_collection_period
@@ -30,7 +31,7 @@ class Form::Lettings::Questions::StockOwner < ::Form::Question
     end
 
     if user.support?
-      Organisation.filter_by_active.where(holds_own_stock: true).find_each do |org|
+      Organisation.visible.filter_by_active.where(holds_own_stock: true).find_each do |org|
         if org.merge_date.present?
           answer_opts[org.id] = "#{org.name} (inactive as of #{org.merge_date.to_fs(:govuk_date)})" if org.merge_date >= FormHandler.instance.start_date_of_earliest_open_for_editing_collection_period
         elsif org.absorbed_organisations.merged_during_open_collection_period.exists? && org.available_from.present?
@@ -40,10 +41,10 @@ class Form::Lettings::Questions::StockOwner < ::Form::Question
         end
       end
     else
-      user.organisation.stock_owners.filter_by_active.each do |stock_owner|
+      user.organisation.stock_owners.visible.filter_by_active.each do |stock_owner|
         answer_opts[stock_owner.id] = stock_owner.name
       end
-      recently_absorbed_organisations.each do |absorbed_org|
+      recently_absorbed_organisations.visible.each do |absorbed_org|
         answer_opts[absorbed_org.id] = merged_organisation_label(absorbed_org.name, absorbed_org.merge_date) if absorbed_org.holds_own_stock?
       end
     end
@@ -64,7 +65,7 @@ class Form::Lettings::Questions::StockOwner < ::Form::Question
   def hidden_in_check_answers?(_log, user = nil)
     return false if user.support?
 
-    stock_owners = user.organisation.stock_owners + user.organisation.absorbed_organisations.where(holds_own_stock: true)
+    stock_owners = user.organisation.stock_owners.visible + user.organisation.absorbed_organisations.visible.where(holds_own_stock: true)
 
     if user.organisation.holds_own_stock?
       stock_owners.count.zero?
diff --git a/app/models/form/sales/questions/managing_organisation.rb b/app/models/form/sales/questions/managing_organisation.rb
index 54d7ab6e0..03609233e 100644
--- a/app/models/form/sales/questions/managing_organisation.rb
+++ b/app/models/form/sales/questions/managing_organisation.rb
@@ -17,7 +17,8 @@ class Form::Sales::Questions::ManagingOrganisation < ::Form::Question
     return opts unless log
 
     if log.managing_organisation.present?
-      opts = opts.merge({ log.managing_organisation.id => log.managing_organisation.name })
+      org_value = log.managing_organisation.label
+      opts = opts.merge({ log.managing_organisation.id => org_value })
     end
 
     if user.support?
@@ -31,14 +32,14 @@ class Form::Sales::Questions::ManagingOrganisation < ::Form::Question
     end
 
     orgs = if user.support?
-             log.owning_organisation.managing_agents.filter_by_active
+             log.owning_organisation.managing_agents.visible.filter_by_active
            elsif user.organisation.absorbed_organisations.include?(log.owning_organisation)
-             user.organisation.managing_agents.filter_by_active + log.owning_organisation.managing_agents.filter_by_active
+             user.organisation.managing_agents.visible.filter_by_active + log.owning_organisation.managing_agents.visible.filter_by_active
            else
-             user.organisation.managing_agents.filter_by_active
+             user.organisation.managing_agents.visible.filter_by_active
            end.pluck(:id, :name).to_h
 
-    user.organisation.absorbed_organisations.each do |absorbed_org|
+    user.organisation.absorbed_organisations.visible.each do |absorbed_org|
       opts[absorbed_org.id] = "#{absorbed_org.name} (inactive as of #{absorbed_org.merge_date.to_fs(:govuk_date)})"
     end
 
diff --git a/app/models/form/sales/questions/owning_organisation_id.rb b/app/models/form/sales/questions/owning_organisation_id.rb
index dc3913882..669c43a0e 100644
--- a/app/models/form/sales/questions/owning_organisation_id.rb
+++ b/app/models/form/sales/questions/owning_organisation_id.rb
@@ -16,25 +16,22 @@ class Form::Sales::Questions::OwningOrganisationId < ::Form::Question
     return answer_opts unless user
     return answer_opts unless log
 
-    unless user.support?
-      if log.owning_organisation_id.present?
-        answer_opts[log.owning_organisation.id] = log.owning_organisation.name
-      end
+    if log.owning_organisation_id.present?
+      org_value = log.owning_organisation.label
+      answer_opts[log.owning_organisation.id] = org_value
+    end
 
+    unless user.support?
       if user.organisation.holds_own_stock?
         answer_opts[user.organisation.id] = "#{user.organisation.name} (Your organisation)"
       end
 
-      user.organisation.stock_owners.filter_by_active.where(holds_own_stock: true).find_each do |org|
+      user.organisation.stock_owners.visible.filter_by_active.where(holds_own_stock: true).find_each do |org|
         answer_opts[org.id] = org.name
       end
     end
 
-    if log.owning_organisation_id.present?
-      answer_opts[log.owning_organisation.id] = log.owning_organisation.name
-    end
-
-    recently_absorbed_organisations = user.organisation.absorbed_organisations.merged_during_open_collection_period
+    recently_absorbed_organisations = user.organisation.absorbed_organisations.visible.merged_during_open_collection_period
     if !user.support? && user.organisation.holds_own_stock?
       answer_opts[user.organisation.id] = if recently_absorbed_organisations.exists? && user.organisation.available_from.present?
                                             "#{user.organisation.name} (Your organisation, active as of #{user.organisation.available_from.to_fs(:govuk_date)})"
@@ -44,7 +41,7 @@ class Form::Sales::Questions::OwningOrganisationId < ::Form::Question
     end
 
     if user.support?
-      Organisation.filter_by_active.where(holds_own_stock: true).find_each do |org|
+      Organisation.visible.filter_by_active.where(holds_own_stock: true).find_each do |org|
         if org.merge_date.present?
           answer_opts[org.id] = "#{org.name} (inactive as of #{org.merge_date.to_fs(:govuk_date)})" if org.merge_date >= FormHandler.instance.start_date_of_earliest_open_for_editing_collection_period
         elsif org.absorbed_organisations.merged_during_open_collection_period.exists? && org.available_from.present?
@@ -54,7 +51,7 @@ class Form::Sales::Questions::OwningOrganisationId < ::Form::Question
         end
       end
     else
-      recently_absorbed_organisations.each do |absorbed_org|
+      recently_absorbed_organisations.visible.each do |absorbed_org|
         answer_opts[absorbed_org.id] = merged_organisation_label(absorbed_org.name, absorbed_org.merge_date) if absorbed_org.holds_own_stock?
       end
     end
@@ -75,7 +72,7 @@ class Form::Sales::Questions::OwningOrganisationId < ::Form::Question
   def hidden_in_check_answers?(_log, user = nil)
     return false if user.support?
 
-    stock_owners = user.organisation.stock_owners + user.organisation.absorbed_organisations.where(holds_own_stock: true)
+    stock_owners = user.organisation.stock_owners.visible + user.organisation.absorbed_organisations.visible.where(holds_own_stock: true)
 
     if user.organisation.holds_own_stock?
       stock_owners.count.zero?
diff --git a/app/models/organisation.rb b/app/models/organisation.rb
index 25a3fdd0d..8f77df166 100644
--- a/app/models/organisation.rb
+++ b/app/models/organisation.rb
@@ -17,6 +17,7 @@ class Organisation < ApplicationRecord
 
   belongs_to :absorbing_organisation, class_name: "Organisation", optional: true
   has_many :absorbed_organisations, class_name: "Organisation", foreign_key: "absorbing_organisation_id"
+  scope :visible, -> { where(discarded_at: nil) }
 
   def affiliated_stock_owners
     ids = []
@@ -143,6 +144,7 @@ class Organisation < ApplicationRecord
   end
 
   def status_at(date)
+    return :deleted if discarded_at.present?
     return :merged if merge_date.present? && merge_date < date
     return :deactivated unless active
 
@@ -178,4 +180,14 @@ class Organisation < ApplicationRecord
 
     false
   end
+
+  def discard!
+    owned_schemes.each(&:discard!)
+    users.each(&:discard!)
+    update!(discarded_at: Time.zone.now)
+  end
+
+  def label
+    status == :deleted ? "#{name} (deleted)" : name
+  end
 end
diff --git a/app/policies/organisation_policy.rb b/app/policies/organisation_policy.rb
index 3e0c9a946..9c27d6e91 100644
--- a/app/policies/organisation_policy.rb
+++ b/app/policies/organisation_policy.rb
@@ -13,4 +13,25 @@ class OrganisationPolicy
   def reactivate?
     user.support? && organisation.status == :deactivated
   end
+
+  def delete_confirmation?
+    delete?
+  end
+
+  def delete?
+    return false unless user.support?
+    return false unless organisation.status == :deactivated || organisation.status == :merged
+
+    !has_any_logs_in_editable_collection_period
+  end
+
+  def has_any_logs_in_editable_collection_period
+    editable_from_date = FormHandler.instance.earliest_open_for_editing_collection_start_date
+    editable_lettings_logs = organisation.lettings_logs.visible.after_date(editable_from_date)
+
+    return true if organisation.lettings_logs.visible.where(startdate: nil).any? || editable_lettings_logs.any?
+
+    editable_sales_logs = organisation.sales_logs.visible.after_date(editable_from_date)
+    organisation.sales_logs.visible.where(saledate: nil).any? || editable_sales_logs.any?
+  end
 end
diff --git a/app/views/organisations/delete_confirmation.html.erb b/app/views/organisations/delete_confirmation.html.erb
new file mode 100644
index 000000000..96dba012a
--- /dev/null
+++ b/app/views/organisations/delete_confirmation.html.erb
@@ -0,0 +1,24 @@
+<% content_for :before_content do %>
+  <% content_for :title, "Are you sure you want to delete this organisation?" %>
+  <%= govuk_back_link(href: :back) %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds-from-desktop">
+    <span class="govuk-caption-xl">Delete <%= @organisation.name %></span>
+    <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 this organisation",
+        delete_organisation_path(@organisation),
+        method: :delete,
+      ) %>
+      <%= govuk_button_link_to "Cancel", organisation_path(@organisation), html: { method: :get }, secondary: true %>
+    </div>
+  </div>
+</div>
diff --git a/app/views/organisations/show.html.erb b/app/views/organisations/show.html.erb
index 26a20926e..214b988f0 100644
--- a/app/views/organisations/show.html.erb
+++ b/app/views/organisations/show.html.erb
@@ -52,3 +52,7 @@
       <%= govuk_button_link_to "Reactivate this organisation", reactivate_organisation_path(@organisation) %>
     </span>
 <% end %>
+
+<% if OrganisationPolicy.new(current_user, @organisation).delete? %>
+  <%= delete_organisation_link(@organisation) %>
+<% end %>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 537fe2114..9dcfed8c3 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -202,6 +202,7 @@ en:
     location_deleted: "%{postcode} has been deleted."
     scheme_deleted: "%{service_name} has been deleted."
     user_deleted: "%{name} has been deleted."
+    organisation_deleted: "%{name} has been deleted."
 
   validations:
     organisation:
diff --git a/config/routes.rb b/config/routes.rb
index 5361f5733..e8932ea45 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -190,6 +190,8 @@ Rails.application.routes.draw do
         get "sales-logs/filters/#{filter}", to: "sales_logs_filters#organisation_#{filter.underscore}"
         get "sales-logs/filters/update-#{filter}", to: "sales_logs_filters#update_organisation_#{filter.underscore}"
       end
+      get "delete-confirmation", to: "organisations#delete_confirmation"
+      delete "delete", to: "organisations#delete"
     end
   end
 
diff --git a/db/migrate/20240610142812_add_discarded_at_to_organisations.rb b/db/migrate/20240610142812_add_discarded_at_to_organisations.rb
new file mode 100644
index 000000000..192e7095c
--- /dev/null
+++ b/db/migrate/20240610142812_add_discarded_at_to_organisations.rb
@@ -0,0 +1,5 @@
+class AddDiscardedAtToOrganisations < ActiveRecord::Migration[7.0]
+  def change
+    add_column :organisations, :discarded_at, :datetime
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1430da65f..66693435f 100644
--- 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_05_29_133005) do
+ActiveRecord::Schema[7.0].define(version: 2024_06_10_142812) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -492,6 +492,7 @@ ActiveRecord::Schema[7.0].define(version: 2024_05_29_133005) do
     t.datetime "merge_date"
     t.bigint "absorbing_organisation_id"
     t.datetime "available_from"
+    t.datetime "discarded_at"
     t.index ["absorbing_organisation_id"], name: "index_organisations_on_absorbing_organisation_id"
     t.index ["old_visible_id"], name: "index_organisations_on_old_visible_id", unique: true
   end
diff --git a/spec/models/form/lettings/questions/managing_organisation_spec.rb b/spec/models/form/lettings/questions/managing_organisation_spec.rb
index 70814b9d5..99319fc71 100644
--- a/spec/models/form/lettings/questions/managing_organisation_spec.rb
+++ b/spec/models/form/lettings/questions/managing_organisation_spec.rb
@@ -58,6 +58,7 @@ RSpec.describe Form::Lettings::Questions::ManagingOrganisation, type: :model do
       let(:managing_org2) { create(:organisation, name: "Managing org 2") }
       let(:managing_org3) { create(:organisation, name: "Managing org 3") }
       let(:inactive_managing_org) { create(:organisation, name: "Inactive managing org", active: false) }
+      let(:deleted_managing_org) { create(:organisation, name: "Deleted managing org", discarded_at: Time.zone.yesterday) }
 
       let(:log) { create(:lettings_log, managing_organisation: managing_org1) }
       let!(:org_rel1) do
@@ -79,6 +80,7 @@ RSpec.describe Form::Lettings::Questions::ManagingOrganisation, type: :model do
 
       it "shows current managing agent at top, followed by user's org (with hint), followed by the active managing agents of the user's org" do
         create(:organisation_relationship, parent_organisation: user.organisation, child_organisation: inactive_managing_org)
+        create(:organisation_relationship, parent_organisation: user.organisation, child_organisation: deleted_managing_org)
 
         expect(question.displayed_answer_options(log, user)).to eq(options)
       end
@@ -104,7 +106,10 @@ RSpec.describe Form::Lettings::Questions::ManagingOrganisation, type: :model do
       end
 
       before do
-        create(:organisation, name: "Inactive managing org", active: false)
+        inactive_managing_org = create(:organisation, name: "Inactive managing org", active: false)
+        create(:organisation_relationship, parent_organisation: log_owning_org, child_organisation: inactive_managing_org)
+        deleted_managing_org = create(:organisation, name: "Deleted managing org", discarded_at: Time.zone.yesterday)
+        create(:organisation_relationship, parent_organisation: log_owning_org, child_organisation: deleted_managing_org)
       end
 
       context "when org owns stock" do
@@ -192,10 +197,12 @@ RSpec.describe Form::Lettings::Questions::ManagingOrganisation, type: :model do
     context "when organisation has merged" do
       let(:absorbing_org) { create(:organisation, name: "Absorbing org", holds_own_stock: true) }
       let!(:merged_org) { create(:organisation, name: "Merged org", holds_own_stock: false) }
+      let!(:merged_deleted_org) { create(:organisation, name: "Merged org", holds_own_stock: false, discarded_at: Time.zone.yesterday) }
       let(:user) { create(:user, :data_coordinator, organisation: absorbing_org) }
 
       let(:log) do
         merged_org.update!(merge_date: Time.zone.local(2023, 8, 2), absorbing_organisation_id: absorbing_org.id)
+        merged_deleted_org.update!(merge_date: Time.zone.local(2023, 8, 2), absorbing_organisation_id: absorbing_org.id)
         create(:lettings_log, owning_organisation: absorbing_org, managing_organisation: nil)
       end
 
diff --git a/spec/models/form/lettings/questions/stock_owner_spec.rb b/spec/models/form/lettings/questions/stock_owner_spec.rb
index a4c7d8fd6..8443f3680 100644
--- a/spec/models/form/lettings/questions/stock_owner_spec.rb
+++ b/spec/models/form/lettings/questions/stock_owner_spec.rb
@@ -47,6 +47,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
       let(:owning_org_1) { create(:organisation, name: "Owning org 1") }
       let(:owning_org_2) { create(:organisation, name: "Owning org 2") }
       let(:inactive_owning_org) { create(:organisation, name: "Inactive owning org", active: false) }
+      let(:deleted_owning_org) { create(:organisation, name: "Deleted owning org", discarded_at: Time.zone.yesterday) }
       let!(:org_rel) do
         create(:organisation_relationship, child_organisation: user.organisation, parent_organisation: owning_org_2)
       end
@@ -64,6 +65,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
 
         it "shows current stock owner at top, followed by user's org (with hint), followed by the active stock owners of the user's org" do
           create(:organisation_relationship, child_organisation: user.organisation, parent_organisation: inactive_owning_org)
+          create(:organisation_relationship, child_organisation: user.organisation, parent_organisation: deleted_owning_org)
           user.organisation.update!(holds_own_stock: true)
           expect(question.displayed_answer_options(log, user)).to eq(options)
         end
@@ -127,6 +129,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
 
       context "when user's org has recently absorbed other orgs and does not have available from date" do
         let(:merged_organisation) { create(:organisation, name: "Merged org") }
+        let(:merged_deleted_organisation) { create(:organisation, name: "Merged deleted org", discarded_at: Time.zone.yesterday) }
         let(:options) do
           {
             "" => "Select an option",
@@ -139,6 +142,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
 
         before do
           merged_organisation.update!(merge_date: Time.zone.local(2023, 2, 2), absorbing_organisation: user.organisation)
+          merged_deleted_organisation.update!(merge_date: Time.zone.local(2023, 2, 2), absorbing_organisation: user.organisation)
           allow(Time).to receive(:now).and_return(Time.zone.local(2023, 11, 10))
         end
 
@@ -172,6 +176,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
 
       context "when user's org has absorbed other orgs with parent organisations during closed collection periods" do
         let(:merged_organisation) { create(:organisation, name: "Merged org") }
+        let(:merged_deleted_organisation) { create(:organisation, name: "Merged deleted org", discarded_at: Time.zone.yesterday) }
         let(:options) do
           {
             "" => "Select an option",
@@ -184,6 +189,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
           allow(Time).to receive(:now).and_return(Time.zone.local(2023, 4, 2))
           org_rel.update!(child_organisation: merged_organisation)
           merged_organisation.update!(merge_date: Time.zone.local(2021, 6, 2), absorbing_organisation: user.organisation)
+          merged_deleted_organisation.update!(merge_date: Time.zone.local(2021, 6, 2), absorbing_organisation: user.organisation)
           user.organisation.update!(available_from: Time.zone.local(2021, 2, 2))
         end
 
@@ -200,8 +206,9 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
       it "shows active orgs where organisation holds own stock" do
         non_stock_organisation = create(:organisation, name: "Non-stockholding org", holds_own_stock: false)
         inactive_organisation = create(:organisation, name: "Inactive org", active: false)
+        deleted_organisation = create(:organisation, name: "Deleted org", discarded_at: Time.zone.yesterday)
 
-        expected_opts = Organisation.filter_by_active.where(holds_own_stock: true).each_with_object(options) do |organisation, hsh|
+        expected_opts = Organisation.visible.filter_by_active.where(holds_own_stock: true).each_with_object(options) do |organisation, hsh|
           hsh[organisation.id] = organisation.name
           hsh
         end
@@ -209,10 +216,12 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
         expect(question.displayed_answer_options(log, user)).to eq(expected_opts)
         expect(question.displayed_answer_options(log, user)).not_to include(non_stock_organisation.id)
         expect(question.displayed_answer_options(log, user)).not_to include(inactive_organisation.id)
+        expect(question.displayed_answer_options(log, user)).not_to include(deleted_organisation.id)
       end
 
       context "and org has recently absorbed other orgs and does not have available from date" do
         let(:merged_organisation) { create(:organisation, name: "Merged org") }
+        let(:merged_deleted_organisation) { create(:organisation, name: "Merged deleted org", discarded_at: Time.zone.yesterday) }
         let(:org) { create(:organisation, name: "User org") }
         let(:options) do
           {
@@ -226,6 +235,7 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
 
         before do
           merged_organisation.update!(merge_date: Time.zone.local(2023, 2, 2), absorbing_organisation: org)
+          merged_deleted_organisation.update!(merge_date: Time.zone.local(2023, 2, 2), absorbing_organisation: org)
           allow(Time).to receive(:now).and_return(Time.zone.local(2023, 11, 10))
         end
 
@@ -273,6 +283,18 @@ RSpec.describe Form::Lettings::Questions::StockOwner, type: :model do
           expect(question.hidden_in_check_answers?(nil, user)).to be false
         end
       end
+
+      context "when stock owner is deleted" do
+        before do
+          organisation_relationship = create(:organisation_relationship, child_organisation: user.organisation)
+          organisation_relationship.parent_organisation.update!(discarded_at: Time.zone.yesterday)
+        end
+
+        it "is hidden in check answers" do
+          expect(user.organisation.stock_owners.count).to eq(1)
+          expect(question.hidden_in_check_answers?(nil, user)).to be true
+        end
+      end
     end
 
     context "when org does not hold own stock", :aggregate_failures do
diff --git a/spec/models/form/sales/questions/managing_organisation_spec.rb b/spec/models/form/sales/questions/managing_organisation_spec.rb
index c9db71423..2ebbf5e01 100644
--- a/spec/models/form/sales/questions/managing_organisation_spec.rb
+++ b/spec/models/form/sales/questions/managing_organisation_spec.rb
@@ -58,6 +58,7 @@ RSpec.describe Form::Sales::Questions::ManagingOrganisation, type: :model do
       let(:managing_org2) { create(:organisation, name: "Managing org 2") }
       let(:managing_org3) { create(:organisation, name: "Managing org 3") }
       let(:inactive_org) { create(:organisation, name: "Inactive org", active: false) }
+      let(:deleted_org) { create(:organisation, name: "Deleted org", discarded_at: Time.zone.yesterday) }
 
       let(:log) do
         create(:lettings_log, owning_organisation: log_owning_org, managing_organisation: managing_org1,
@@ -83,6 +84,7 @@ RSpec.describe Form::Sales::Questions::ManagingOrganisation, type: :model do
 
         it "shows current managing agent at top, followed by the current owning organisation (with hint), followed by the active managing agents of the current owning organisation" do
           create(:organisation_relationship, parent_organisation: log_owning_org, child_organisation: inactive_org)
+          create(:organisation_relationship, parent_organisation: log_owning_org, child_organisation: deleted_org)
           log_owning_org.update!(holds_own_stock: true)
           expect(question.displayed_answer_options(log, user)).to eq(options)
         end
@@ -135,10 +137,12 @@ RSpec.describe Form::Sales::Questions::ManagingOrganisation, type: :model do
     context "when organisation has merged" do
       let(:absorbing_org) { create(:organisation, name: "Absorbing org", holds_own_stock: true) }
       let!(:merged_org) { create(:organisation, name: "Merged org", holds_own_stock: false) }
+      let!(:merged_deleted_org) { create(:organisation, name: "Merged deleted org", holds_own_stock: false, discarded_at: Time.zone.yesterday) }
       let(:user) { create(:user, :support, organisation: absorbing_org) }
 
       let(:log) do
         merged_org.update!(merge_date: Time.zone.local(2023, 8, 2), absorbing_organisation_id: absorbing_org.id)
+        merged_deleted_org.update!(merge_date: Time.zone.local(2023, 8, 2), absorbing_organisation_id: absorbing_org.id)
         create(:lettings_log, owning_organisation: absorbing_org, managing_organisation: nil)
       end
 
diff --git a/spec/models/form/sales/questions/owning_organisation_id_spec.rb b/spec/models/form/sales/questions/owning_organisation_id_spec.rb
index ea904b400..bc6fad6e5 100644
--- a/spec/models/form/sales/questions/owning_organisation_id_spec.rb
+++ b/spec/models/form/sales/questions/owning_organisation_id_spec.rb
@@ -123,6 +123,11 @@ RSpec.describe Form::Sales::Questions::OwningOrganisationId, type: :model do
         it "shows merged organisation as an option" do
           expect(question.displayed_answer_options(log, user)).to eq(options)
         end
+
+        it "does not show absorbed organisation if it has been deleted" do
+          merged_organisation.update!(discarded_at: Time.zone.yesterday)
+          expect(question.displayed_answer_options(log, user)).to eq(options.except(merged_organisation.id))
+        end
       end
 
       context "when user's org has recently absorbed other orgs and it has available from date" do
@@ -200,8 +205,9 @@ RSpec.describe Form::Sales::Questions::OwningOrganisationId, type: :model do
       it "shows active orgs where organisation holds own stock" do
         non_stock_organisation = create(:organisation, holds_own_stock: false)
         inactive_org = create(:organisation, active: false)
+        deleted_organisation = create(:organisation, discarded_at: Time.zone.yesterday)
 
-        expected_opts = Organisation.filter_by_active.where(holds_own_stock: true).each_with_object(options) do |organisation, hsh|
+        expected_opts = Organisation.visible.filter_by_active.where(holds_own_stock: true).each_with_object(options) do |organisation, hsh|
           hsh[organisation.id] = organisation.name
           hsh
         end
@@ -210,6 +216,7 @@ RSpec.describe Form::Sales::Questions::OwningOrganisationId, type: :model do
         expect(question.displayed_answer_options(log, user)).not_to include(non_stock_organisation.id)
         expect(question.displayed_answer_options(log, user)).not_to include(inactive_org.id)
         expect(question.displayed_answer_options(log, user)).to include(organisation_1.id)
+        expect(question.displayed_answer_options(log, user)).not_to include(deleted_organisation.id)
       end
 
       context "when an org has recently absorbed other orgs" do
diff --git a/spec/policies/organisation_policy_spec.rb b/spec/policies/organisation_policy_spec.rb
index 4fb4c6761..89cb62198 100644
--- a/spec/policies/organisation_policy_spec.rb
+++ b/spec/policies/organisation_policy_spec.rb
@@ -63,4 +63,112 @@ RSpec.describe OrganisationPolicy do
       expect(policy).not_to permit(support, organisation)
     end
   end
+
+  permissions :delete? do
+    let(:organisation) { FactoryBot.create(:organisation) }
+
+    context "with active organisation" do
+      it "does not allow deleting a organisation as a provider" do
+        expect(policy).not_to permit(data_provider, organisation)
+      end
+
+      it "does not allow allows deleting a organisation as a coordinator" do
+        expect(policy).not_to permit(data_coordinator, organisation)
+      end
+
+      it "does not allow deleting a organisation as a support user" do
+        expect(policy).not_to permit(support, organisation)
+      end
+    end
+
+    context "with deactivated organisation" do
+      before do
+        organisation.update!(active: false)
+      end
+
+      it "does not allow deleting a organisation as a provider" do
+        expect(policy).not_to permit(data_provider, organisation)
+      end
+
+      it "does not allow allows deleting a organisation as a coordinator" do
+        expect(policy).not_to permit(data_coordinator, organisation)
+      end
+
+      it "allows deleting a organisation as a support user" do
+        expect(policy).to permit(support, organisation)
+      end
+
+      context "and associated lettings logs in editable collection period" do
+        before do
+          create(:lettings_log, owning_organisation: organisation)
+        end
+
+        it "does not allow deleting a organisation as a provider" do
+          expect(policy).not_to permit(data_provider, organisation)
+        end
+
+        it "does not allow allows deleting a organisation as a coordinator" do
+          expect(policy).not_to permit(data_coordinator, organisation)
+        end
+
+        it "does not allow deleting a organisation as a support user" do
+          expect(policy).not_to permit(support, organisation)
+        end
+      end
+
+      context "and deleted associated lettings logs in editable collection period" do
+        before do
+          create(:lettings_log, owning_organisation: organisation, discarded_at: Time.zone.yesterday)
+        end
+
+        it "does not allow deleting a organisation as a provider" do
+          expect(policy).not_to permit(data_provider, organisation)
+        end
+
+        it "does not allow allows deleting a organisation as a coordinator" do
+          expect(policy).not_to permit(data_coordinator, organisation)
+        end
+
+        it "allows deleting a organisation as a support user" do
+          expect(policy).to permit(support, organisation)
+        end
+      end
+
+      context "and associated sales logs in editable collection period" do
+        before do
+          create(:sales_log, owning_organisation: organisation)
+        end
+
+        it "does not allow deleting a organisation as a provider" do
+          expect(policy).not_to permit(data_provider, organisation)
+        end
+
+        it "does not allow allows deleting a organisation as a coordinator" do
+          expect(policy).not_to permit(data_coordinator, organisation)
+        end
+
+        it "does not allow deleting a organisation as a support user" do
+          expect(policy).not_to permit(support, organisation)
+        end
+      end
+
+      context "and deleted associated sales logs in editable collection period" do
+        before do
+          create(:sales_log, owning_organisation: organisation, discarded_at: Time.zone.yesterday)
+        end
+
+        it "does not allow deleting a organisation as a provider" do
+          expect(policy).not_to permit(data_provider, organisation)
+        end
+
+        it "does not allow allows deleting a organisation as a coordinator" do
+          expect(policy).not_to permit(data_coordinator, organisation)
+        end
+
+        it "allows deleting a organisation as a support user" do
+          expect(policy).to permit(support, organisation)
+        end
+      end
+    end
+  end
 end
diff --git a/spec/requests/organisations_controller_spec.rb b/spec/requests/organisations_controller_spec.rb
index f30a1e4eb..68f69d9f2 100644
--- a/spec/requests/organisations_controller_spec.rb
+++ b/spec/requests/organisations_controller_spec.rb
@@ -47,6 +47,34 @@ RSpec.describe OrganisationsController, type: :request do
         expect(response).to redirect_to("/account/sign-in")
       end
     end
+
+    describe "#delete-confirmation" do
+      let(:organisation) { create(:organisation) }
+
+      before do
+        get "/organisations/#{organisation.id}/delete-confirmation"
+      end
+
+      context "when not signed in" do
+        it "redirects to the sign in page" do
+          expect(response).to redirect_to("/account/sign-in")
+        end
+      end
+    end
+
+    describe "#delete" do
+      let(:organisation) { create(:organisation) }
+
+      before do
+        delete "/organisations/#{organisation.id}/delete"
+      end
+
+      context "when not signed in" do
+        it "redirects to the sign in page" do
+          expect(response).to redirect_to("/account/sign-in")
+        end
+      end
+    end
   end
 
   context "when user is signed in" do
@@ -747,6 +775,38 @@ RSpec.describe OrganisationsController, type: :request do
           end
         end
       end
+
+      describe "#delete-confirmation" do
+        let(:organisation) { user.organisation }
+
+        before do
+          get "/organisations/#{organisation.id}/delete-confirmation"
+        end
+
+        context "with a data provider user" do
+          let(:user) { create(:user) }
+
+          it "returns 401 unauthorized" do
+            expect(response).to have_http_status(:unauthorized)
+          end
+        end
+      end
+
+      describe "#delete" do
+        let(:organisation) { user.organisation }
+
+        before do
+          delete "/organisations/#{organisation.id}/delete"
+        end
+
+        context "with a data provider user" do
+          let(:user) { create(:user) }
+
+          it "returns 401 unauthorized" do
+            expect(response).to have_http_status(:unauthorized)
+          end
+        end
+      end
     end
 
     context "with a data provider user" do
@@ -876,6 +936,38 @@ RSpec.describe OrganisationsController, type: :request do
           expect(response).to have_http_status(:unauthorized)
         end
       end
+
+      describe "#delete-confirmation" do
+        let(:organisation) { user.organisation }
+
+        before do
+          get "/organisations/#{organisation.id}/delete-confirmation"
+        end
+
+        context "with a data provider user" do
+          let(:user) { create(:user) }
+
+          it "returns 401 unauthorized" do
+            expect(response).to have_http_status(:unauthorized)
+          end
+        end
+      end
+
+      describe "#delete" do
+        let(:organisation) { user.organisation }
+
+        before do
+          delete "/organisations/#{organisation.id}/delete"
+        end
+
+        context "with a data provider user" do
+          let(:user) { create(:user) }
+
+          it "returns 401 unauthorized" do
+            expect(response).to have_http_status(:unauthorized)
+          end
+        end
+      end
     end
 
     context "with a support user" do
@@ -1431,6 +1523,89 @@ RSpec.describe OrganisationsController, type: :request do
         end
       end
 
+      describe "#show" do
+        let(:organisation) { create(:organisation) }
+
+        before do
+          get "/organisations/#{organisation.id}", headers:, params: {}
+        end
+
+        context "with an active organisation" do
+          it "does not render delete this organisation" do
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).not_to have_link("Delete this organisation", href: "/organisations/#{organisation.id}/delete-confirmation")
+          end
+
+          it "does not render informative text about deleting the organisation" do
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).not_to have_content("This organisation was active in an open or editable collection year, and cannot be deleted.")
+          end
+        end
+
+        context "with an inactive organisation" do
+          let(:organisation) { create(:organisation, active: false) }
+
+          it "renders delete this organisation" do
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).to have_link("Delete this organisation", href: "/organisations/#{organisation.id}/delete-confirmation")
+          end
+
+          context "and associated lettings logs in editable collection period" do
+            before do
+              create(:lettings_log, owning_organisation: organisation)
+              get "/organisations/#{organisation.id}"
+            end
+
+            it "does not render delete this organisation" do
+              follow_redirect!
+              expect(response).to have_http_status(:ok)
+              expect(page).not_to have_link("Delete this organisation", href: "/organisations/#{organisation.id}/delete-confirmation")
+            end
+
+            it "adds informative text about deleting the organisation" do
+              follow_redirect!
+              expect(response).to have_http_status(:ok)
+              expect(page).to have_content("This organisation was active in an open or editable collection year, and cannot be deleted.")
+            end
+          end
+
+          context "and associated sales logs in editable collection period" do
+            before do
+              create(:sales_log, owning_organisation: organisation)
+              get "/organisations/#{organisation.id}"
+            end
+
+            it "does not render delete this organisation" do
+              follow_redirect!
+              expect(response).to have_http_status(:ok)
+              expect(page).not_to have_link("Delete this organisation", href: "/organisations/#{organisation.id}/delete-confirmation")
+            end
+
+            it "adds informative text about deleting the organisation" do
+              follow_redirect!
+              expect(response).to have_http_status(:ok)
+              expect(page).to have_content("This organisation was active in an open or editable collection year, and cannot be deleted.")
+            end
+          end
+        end
+
+        context "with merged organisation" do
+          before do
+            organisation.update!(merge_date: Time.zone.yesterday)
+            get "/organisations/#{organisation.id}", headers:, params: {}
+          end
+
+          it "renders delete this organisation" do
+            follow_redirect!
+            expect(response).to have_http_status(:ok)
+            expect(page).to have_link("Delete this organisation", href: "/organisations/#{organisation.id}/delete-confirmation")
+          end
+        end
+      end
+
       describe "#update" do
         let(:params) { { id: organisation.id, organisation: { active:, rent_periods: [], all_rent_periods: [] } } }
 
@@ -1581,6 +1756,79 @@ RSpec.describe OrganisationsController, type: :request do
         end
       end
 
+      describe "#delete-confirmation" do
+        let(:organisation) { create(:organisation, active: false) }
+
+        before do
+          get "/organisations/#{organisation.id}/delete-confirmation"
+        end
+
+        it "shows the correct title" do
+          expect(page.find("h1").text).to include "Are you sure you want to delete this organisation?"
+        end
+
+        it "shows a warning to the user" do
+          expect(page).to have_selector(".govuk-warning-text", text: "You will not be able to undo this action")
+        end
+
+        it "shows a button to delete the selected organisation" do
+          expect(page).to have_selector("form.button_to button", text: "Delete this organisation")
+        end
+
+        it "the delete organisation button submits the correct data to the correct path" do
+          form_containing_button = page.find("form.button_to")
+
+          expect(form_containing_button[:action]).to eq delete_organisation_path(organisation)
+          expect(form_containing_button).to have_field "_method", type: :hidden, with: "delete"
+        end
+
+        it "shows a cancel link with the correct style" do
+          expect(page).to have_selector("a.govuk-button--secondary", text: "Cancel")
+        end
+
+        it "shows cancel link that links back to the organisation page" do
+          expect(page).to have_link(text: "Cancel", href: organisation_path(organisation))
+        end
+      end
+
+      describe "#delete" do
+        let(:organisation) { create(:organisation, active: false) }
+        let!(:org_user) { create(:user, active: false, organisation:) }
+        let!(:scheme) { create(:scheme, owning_organisation: organisation) }
+        let!(:location) { create(:location, scheme:) }
+
+        before do
+          scheme.scheme_deactivation_periods << SchemeDeactivationPeriod.new(deactivation_date: Time.zone.yesterday)
+          location.location_deactivation_periods << LocationDeactivationPeriod.new(deactivation_date: Time.zone.yesterday)
+          delete "/organisations/#{organisation.id}/delete"
+        end
+
+        it "deletes the organisation and related resources" do
+          organisation.reload
+          expect(organisation.status).to eq(:deleted)
+          expect(organisation.discarded_at).not_to be nil
+          expect(location.reload.status).to eq(:deleted)
+          expect(location.discarded_at).not_to be nil
+          expect(scheme.reload.status).to eq(:deleted)
+          expect(scheme.discarded_at).not_to be nil
+          expect(org_user.reload.status).to eq(:deleted)
+          expect(org_user.discarded_at).not_to be nil
+        end
+
+        it "redirects to the organisations list and displays a notice that the organisation has been deleted" do
+          expect(response).to redirect_to organisations_path
+          follow_redirect!
+          expect(page).to have_selector(".govuk-notification-banner--success")
+          expect(page).to have_selector(".govuk-notification-banner--success", text: "#{organisation.name} has been deleted.")
+        end
+
+        it "does not display the deleted organisation" do
+          expect(response).to redirect_to organisations_path
+          follow_redirect!
+          expect(page).not_to have_content("Organisation to delete")
+        end
+      end
+
       context "when they view the lettings logs tab" do
         let(:tenancycode) { "42" }