When choosing a UK casino with many high RTP slots, remember RTP is theoretical...

https://www.runway-bookmarks.win/to-find-a-uk-casino-with-many-high-rtp-slots-start-by-checking-the-size-of-the

When choosing a UK casino with many high RTP slots, remember RTP is theoretical and doesn’t guarantee wins. Check the game library size to see if there’s variety and look for well-known software providers for quality games