A UKGC licence is the baseline, not the full picture. See if RTP figures are...

https://www.start-bookmarks.win/good-uk-slot-sites-meet-ukgc-rules-as-a-baseline-but-that-alone-is-not-enough

A UKGC licence is the baseline, not the full picture. See if RTP figures are clear, cashouts are prompt, and tools like limits, time-outs and self-exclusion are easy to access