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

https://wiki-wire.win/index.php/What_does_%E2%80%98rapid_withdrawals%E2%80%99_actually_mean_on_gambling_sites%3F

Before signing up, check the operator on the UK Gambling Commission register. Read bonus terms closely, including any 10x wagering cap; don’t trust headline sums. Check mobile usability, withdrawal times, fees and limits before deciding.