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

https://remote-wiki.win/index.php/What_Are_the_Main_Revenue_Streams_for_a_UK_Online_Casino_Besides_the_House_Edge%3F

UK online casinos operate under strict rules set by the UK Gambling Commission, including limits on payout percentages and player protections like deposit limits. Many games have a stated 96% return to player (RTP), meaning the house keeps a cut over time