When choosing a UK casino with a solid slot library, look for sites that...

https://casinocrowd.com/what-are-megaways-slots-and-do-they-usually-have-lower-rtp/

When choosing a UK casino with a solid slot library, look for sites that clearly state RTP info since RTP reflects long-term payouts, not short-term results. Some slots have different RTP versions depending on the operator