Per https://wikitech.wikimedia.org/wiki/Maps/External_usage, please allow Wikimedia Maps to be used on bbcrewind.co.uk:
Link to site: bbcrewind.co.uk
The specific URLs for the different environments of our application that would use the Welsh-language map are:
Purpose/details about your project: We are aiming for a launch date of 1st of July 2022 for the UK-wide application, which would include the Welsh-language map. If we were able to have access to the Welsh-language map before that for testing, it would be helpful.
Wikimedia Affiliate supporting project: BBC is not an official WMF affiliate but I do believe they are mission-aligned and I @sdkim will make the decision to approve them for being added to the allow-list.