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

https://post-wiki.win/index.php/Big_Time_Gaming_and_Relax_Gaming_-_what_should_I_expect%3F

A UKGC licence is the baseline, not a guarantee of a smooth experience. Compare published RTPs, check withdrawal timeframes and look for accessible deposit limits, time-outs and self-exclusion