A UKGC licence is the starting point, not a guarantee of a smooth experience....

https://zanessmartcolumn.brightsora.com/posts/why-one-tap-access-to-limits-matters-more-than-people-think

A UKGC licence is the starting point, not a guarantee of a smooth experience. Check whether a site clearly lists slot RTPs, explains how long withdrawals usually take, and offers practical responsible gambling tools such as deposit limits and time-outs