Axe test failing due to missing landmark

[kieranohanlon]

When running the Axe integration tests in UDU to check accessibility we are getting the following error:
Ensure all page content is contained by landmarks
Failing HTML:
<div class=\"header-branding sc-admiralty-header\">
For more info see https://dequeuniversity.com/rules/axe/4.10/region?application=playwright

This is against design sys v4.2.1

To Reproduce
Steps to reproduce the behavior:

1. Go to https://devukhodataupload.admiralty.co.uk/not-found-error
2. View source
3. See that it has missing landmark/roles

Expected behavior
The Axe test should pass - assume that a role or landmark needs applying to the div?

Screenshots
HTML of the issue (black star is the erroring code). Yellow highlights have landmarks and the red is a role that is also applied: