I avoid any casino, that have written that they require a copy of your card, passport and a recent utility bill for withdrawals.
They can accept the money without checking, so I don't see why they can't pay it out without needing checks either. Not comfortable with some company abroad holding so much details about me anyway, particularly the passport bit. I personally don't get any utility bills either,because I pay rent and some because I have online billing only. Also companies abroad are not subject to UK law, so it can be a bugger to make any sort of complaint.
Thankfully, some companies can verify you automatically if you are on the electoral role. Mainly those based in the UK or Channel Islands.