Before signing up, check the operator on the UK Gambling Commission register....

https://www.bookmark-xray.win/before-signing-up-check-the-site-s-licence-on-the-uk-gambling-commission

Before signing up, check the operator on the UK Gambling Commission register. Treat headline bonuses cautiously: read the terms and check the 10x wagering cap for licensed operators. Test mobile usability and look for clear, reliable withdrawal options.