Publish new service unavailable page for planned maintenance of web UI

docs/pages/support/planned-maintenance.md

@@ -0,0 +1,30 @@
+---
+# Feel free to add content and custom Front Matter to this file.
+# To modify the layout, see https://jekyllrb.com/docs/themes/#overriding-theme-defaults
+
+layout: no-nav-page
+title: Sorry, this service is currently unavailable
+nav_order: 5
+has_children: true
+permalink: /service-unavailable/
+---
+
+We’re carrying out planned updates.
+
+You’ll be able to use the service again soon.
+
+If you reached this page after submitting information, your progress has not been saved. You’ll need to enter the information again when the service is available.
+
+If you need urgent support, <a href="https://nhsdigitallive.service-now.com/csm?id=sc_cat_item&sys_id=6cc625151b9fbad083b0a7d0b24bcb11&referrer=recent_items" target="_blank">submit a case with ServiceNow (opens in a new tab)</a>.
+
+{% include components/details.html
+heading='How to submit a ServiceNow case'
+text='
+
+1. Go to <a href="https://nhsdigitallive.service-now.com/csm?id=sc_cat_item&sys_id=6cc625151b9fbad083b0a7d0b24bcb11&referrer=recent_items" target="_blank">ServiceNow (opens in a new tab)</a>.
+2. Log in with your NHS.net account, or register for a Portal account.
+3. In the <b>Description</b> field, include your service name, your full name and the action you were trying to take.
+4. For the <b>service offering</b>, select the relevant option.
+5. Upload any relevant screenshots or documents in the <b>Add attachments</b> section.
+   '
+   %}