UK online casinos operate under strict rules set by the UK Gambling Commission,...

https://station-wiki.win/index.php/Why_Do_Most_UK_Casinos_Have_the_Same_Slot_Providers%3F

UK online casinos operate under strict rules set by the UK Gambling Commission, ensuring fairness and transparency. For example, most games offer a minimum 96% return to player (RTP), and many now support Faster Payments to process withdrawals quickly