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

https://astro-wiki.win/index.php/Are_Slots_Considered_Gambling_or_Betting%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