Not all online casinos operate under a valid UK license, and this difference...

https://www.timesargus.com/licensed-vs-unlicensed-what-online-casino-players-are-actually-agreeing-to/article_dccaee13-c783-4249-9204-b8b58953822b.html

Not all online casinos operate under a valid UK license, and this difference can affect your play