When choosing a UK casino with many high RTP slots, start by checking the size...

https://www.phone-bookmarks.win/when-choosing-a-uk-casino-with-many-high-rtp-slots-start-by-checking-the-game

When choosing a UK casino with many high RTP slots, start by checking the size of its game library and which software providers supply the games. Remember, RTP is theoretical and doesn't guarantee wins