diff --git a/lib/tasks/election.rake b/lib/tasks/election.rake
index 719d1e2781c..590c09084ab 100644
--- a/lib/tasks/election.rake
+++ b/lib/tasks/election.rake
@@ -59,4 +59,34 @@ namespace :election do
       puts e.message
     end
   end
+
+  desc "
+  Mark all documents of a given organisation as political
+    Usage:
+    rake election:mark_documents_as_political_for[organisation_slug, '30-12-2024']
+    "
+  task :mark_documents_as_political_for, %i[slug date] => :environment do |_t, args|
+    date = Date.parse(args[:date])
+    org = Organisation.find_by!(slug: args[:slug])
+    puts "Marking all documents as political for #{org.name}..."
+
+    editions = org.editions
+    published = editions
+      .published
+      .where("first_published_at >= ?", date)
+
+    puts "Marking #{published.size} published editions as political..."
+    published.update_all(political: true)
+
+    pre_published_editions = Edition.in_pre_publication_state.where(document_id: published.map(&:document_id))
+
+    puts "Updating #{pre_published_editions.size} pre-publication editions as political..."
+    pre_published_editions.update_all(political: true)
+
+    puts "Done"
+  rescue Date::Error => _e
+    puts "The date is not on the right format [\"#{args[:date]}\"]"
+  rescue ActiveRecord::RecordNotFound => _e
+    puts "There is no Organisation with slug [\"#{args[:slug]}\"]"
+  end
 end
diff --git a/test/unit/lib/tasks/election_mark_organisation_documents_as_political_test.rb b/test/unit/lib/tasks/election_mark_organisation_documents_as_political_test.rb
new file mode 100644
index 00000000000..810fde92779
--- /dev/null
+++ b/test/unit/lib/tasks/election_mark_organisation_documents_as_political_test.rb
@@ -0,0 +1,47 @@
+require "test_helper"
+require "rake"
+
+class MarkDocumentsAsPoliticalFor < ActiveSupport::TestCase
+  extend Minitest::Spec::DSL
+
+  teardown { task.reenable }
+
+  describe "#mark_as_political" do
+    let(:task) { Rake::Task["election:mark_documents_as_political_for"] }
+    let(:organisation) { create(:organisation) }
+    let(:document) { create(:document) }
+    let(:published_edition) { create(:edition, :published, document:, first_published_at: "01-01-2023") }
+    let(:draft_edition) { create(:edition, :draft, document:) }
+    let(:date) { "31-12-2022" }
+
+    setup do
+      organisation.editions = [published_edition, draft_edition]
+      organisation.save!
+    end
+
+    it "raises an error if organisation does not exist" do
+      out, _err = capture_io { task.invoke("non-existent-slug", date) }
+      assert_equal 'There is no Organisation with slug ["non-existent-slug"]', out.strip
+    end
+
+    it "raises an error if date is not right format" do
+      out, _err = capture_io { task.invoke(organisation.slug, "not a date") }
+      assert_equal 'The date is not on the right format ["not a date"]', out.strip
+    end
+
+    it "marks published editions of documents first published after the specified date and any associated drafts as political" do
+      capture_io { task.invoke(organisation.slug, date) }
+      assert published_edition.reload.political
+      assert draft_edition.reload.political
+    end
+
+    it "does not mark editions unrelated to documents first published before the specified date as political" do
+      non_political_document = create(:document)
+      create(:edition, :published, document: non_political_document, first_published_at: "30-12-2022")
+      create(:edition, :draft, document: non_political_document)
+      capture_io { task.invoke(organisation.slug, date) }
+      assert_not non_political_document.reload.live_edition.political
+      assert_not non_political_document.reload.latest_edition.political
+    end
+  end
+end