A UKGC licence is the baseline, not a guarantee of a smooth experience. Compare...

https://www.pawn-bookmarks.win/good-uk-slot-platforms-make-the-basics-easy-to-check-ukgc-licensing-is-the

A UKGC licence is the baseline, not a guarantee of a smooth experience. Compare published RTPs, check withdrawal times and verification steps, and make sure deposit limits, time-outs and self-exclusion tools are easy to find