Pub owner here. Police are having a major crack down nationally on fake ID at the moment. I have just been given my info pack on it, all several million pages of it slight exaggeration.
What we have been told to do is take any fake ID and pass it on to the police. If it is a fake they investigate and destroy, if it is someone elses they have to collect from the police station. The parents will be contacted.
Basic rule is no ID no entry. Its up to us if we deem the ID to be good enough, I may well have refused legitimate 18 yr olds who's ID I didn't accept, but I/we make pour decision based on the card/passport put into our hands, nothing else.
What the bouncers did was ridiculous. They have the right to search -WITH PERMISSION. If your dc refused she is at liberty to walk away. You can say I will only let you in if I can search your bag. The choice is then theirs but bouncers/managers are not police and we have no right to search.
We rareky search, don't have much of a drug problem, but every now and then the police crack down on that and make sure we are making random searches. When we do search, I seach the women and the bouncers search the men. We do it at the door, certainly not hidden away.
Complain to the club and the SIA about that bouncer. Contact the police about getting the ID returned. tell them the club confiscated it and are refusing to return it. Again pub managers/bouncers have no legal power to withold them.