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

https://www.bookmarkingqueen.win/uk-online-casinos-operate-under-strict-rules-set-by-the-uk-gambling-commission-3

UK online casinos operate under strict rules set by the UK Gambling Commission to keep play fair. They often feature games with a 96% Return to Player rate, meaning most money goes back to players over time