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

https://www.inter-bookmarks.win/when-choosing-a-uk-casino-with-many-high-rtp-slots-look-beyond-rtp-rates-since

When choosing a UK casino with many high RTP slots, remember RTP is theoretical and doesn’t guarantee wins. Look for casinos with a large game library and well-known software providers