diff --git a/app/controllers/merge_requests_controller.rb b/app/controllers/merge_requests_controller.rb
index 6d7738204..e5ca945db 100644
--- a/app/controllers/merge_requests_controller.rb
+++ b/app/controllers/merge_requests_controller.rb
@@ -12,6 +12,7 @@ class MergeRequestsController < ApplicationController
   def new_organisation_telephone_number; end
   def new_organisation_type; end
   def merge_date; end
+  def helpdesk_ticket; end
 
   def create
     ActiveRecord::Base.transaction do
@@ -62,6 +63,8 @@ private
       else
         confirm_telephone_number_merge_request_path(@merge_request)
       end
+    when "helpdesk_ticket"
+      merge_request_path(@merge_request)
     when "confirm_telephone_number"
       merge_date_merge_request_path(@merge_request)
     when "new_organisation_name"
@@ -97,6 +100,7 @@ private
     merge_params = params.fetch(:merge_request, {}).permit(
       :requesting_organisation_id,
       :other_merging_organisations,
+      :helpdesk_ticket,
       :status,
       :absorbing_organisation_id,
       :telephone_number_correct,
diff --git a/app/helpers/merge_requests_helper.rb b/app/helpers/merge_requests_helper.rb
index 9f6afe1df..e82ff0f87 100644
--- a/app/helpers/merge_requests_helper.rb
+++ b/app/helpers/merge_requests_helper.rb
@@ -6,7 +6,7 @@ module MergeRequestsHelper
   def request_details(merge_request)
     [
       { label: "Requester", value: display_value_or_placeholder(merge_request.requester&.name) },
-      { label: "Helpdesk ticket", value: merge_request.helpdesk_ticket.present? ? link_to("#{merge_request.helpdesk_ticket} (opens in a new tab)", "https://dluhcdigital.atlassian.net/browse/#{merge_request.helpdesk_ticket}", target: "_blank", rel: "noopener noreferrer") : display_value_or_placeholder(nil), action: merge_request.status == "request_merged" ? nil : { text: "Change", href: "#", visually_hidden_text: "helpdesk ticket" } },
+      { label: "Helpdesk ticket", value: merge_request.helpdesk_ticket.present? ? link_to("#{merge_request.helpdesk_ticket} (opens in a new tab)", "https://dluhcdigital.atlassian.net/browse/#{merge_request.helpdesk_ticket}", target: "_blank", rel: "noopener noreferrer") : display_value_or_placeholder(nil), action: merge_request.status == "request_merged" ? nil : { text: "Change", href: helpdesk_ticket_merge_request_path(merge_request), visually_hidden_text: "helpdesk ticket" } },
       { label: "Status", value: status_tag(merge_request.status) },
     ]
   end
diff --git a/app/views/merge_requests/helpdesk_ticket.html.erb b/app/views/merge_requests/helpdesk_ticket.html.erb
new file mode 100644
index 000000000..6c2fe741a
--- /dev/null
+++ b/app/views/merge_requests/helpdesk_ticket.html.erb
@@ -0,0 +1,27 @@
+<% content_for :before_content do %>
+  <% title = "Which helpdesk ticket reported this merge?" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_date_merge_request_path(@merge_request) %>
+<% end %>
+
+<%= form_with model: @merge_request, url: merge_request_path, method: :patch do |f| %>
+  <%= f.govuk_error_summary %>
+
+  <h1 class="govuk-heading-l">Which helpdesk ticket reported this merge?</h1>
+  <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds-from-desktop">
+      <p class="govuk-hint">If this merge was reported via the helpdesk ticket, provide the ticket number.<br>The ticket will be linked to the merge request for reference.</p>
+      <br>
+      <div class="govuk-grid-row">
+        <div class="govuk-grid-column-two-thirds-from-desktop">
+          <%= f.govuk_text_field :helpdesk_ticket, caption: { text: "Ticket number", class: "govuk-label--m" }, label: { text: "For example, MSD-12345" }%>
+          <%= f.hidden_field :page, value: "helpdesk_ticket" %>
+          <div class="govuk-button-group">
+            <%= f.govuk_submit %>
+            <%= govuk_link_to("Skip for now", merge_request_path(@merge_request)) %>
+          </div>
+        </div>
+      </div>
+    <% end %>
+  </div>
+</div>
diff --git a/config/routes.rb b/config/routes.rb
index fbb59a7d0..537d58b77 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -205,7 +205,7 @@ Rails.application.routes.draw do
       get "new-organisation-telephone-number"
       get "new-organisation-type"
       get "merge-date"
-      get "details", to: "merge_requests#details"
+      get "helpdesk-ticket"
     end
   end