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

https://wiki-dale.win/index.php/What_Does_the_UK_Gambling_Commission_Actually_Require_From_Casinos%3F

UK online casinos operate under strict rules set by the UK Gambling Commission, ensuring fair play and player protection. A common example is games with a 96% return to player (RTP), meaning players can expect some losses over time