When choosing a UK casino with a solid slot library, consider the long-term RTP...

https://xn--toponlinecsino-uub.com/which-casinos-are-good-for-megaways-slots-in-the-uk/

When choosing a UK casino with a solid slot library, consider the long-term RTP since it's an average return over many spins. Some games have different RTP versions depending on the operator