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

https://wiki-planet.win/index.php/What_should_customer_support_look_like_on_a_legit_betting_site%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.