When choosing a UK casino with many high RTP slots, start by exploring the game...

https://jeffreysinterestingcolumns.trexgame.net/is-it-normal-for-casinos-to-add-new-games-throughout-the-year

When choosing a UK casino with many high RTP slots, start by exploring the game library size and variety. Look for well-known software providers who often offer transparent RTP info. Keep in mind RTP is theoretical and doesn’t guarantee wins