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

https://remote-wiki.win/index.php/What%E2%80%99s_a_realistic_checklist_for_comparing_a_new_betting_site_in_the_UK%3F

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.