Casino games, gambling, and betting all mean different things under the UK...

https://aged-wiki.win/index.php/Is_Betting_Always_About_an_Event_Outcome%3F

Casino games, gambling, and betting all mean different things under the UK Gambling Act 2005. Casinos offer games like roulette where you play against the house. Gambling covers a wider range of activities involving risking money, including betting