When choosing a UK casino with a solid slot library and good RTP, remember RTP...

https://wiki-planet.win/index.php/Why_Does_the_Same_Slot_Have_Different_RTP_on_Different_Casinos%3F

When choosing a UK casino with a solid slot library and good RTP, remember RTP reflects long-term returns, so it's about consistent value over many spins. Some slots offer different RTP versions depending on the operator