I think its going to be very hard to fight this sort of stuff until gamstop becomes mandatory for all UKGC licensed casinos, as there is still no date until it becomes mandatory and it might not ever become mandatory. Casinos will always have that shuffle room.
Thats why it was only Gamstop registered casinos chosen. Also the new UKGC verification rules should be black and white, they are very clear. Yet some still get it wrong. Think the UKGC are likely to come down hard on some of these.