We attended and vlogged the event, they really made a good effort, the characters were really cool probably spent an hour and a half inside, paid on the door was in very quickly. Great you captured some content
You should see it you can join one of the cosplay groups (ours is a judge Dredd Group called 'May the Law be with you' ) you would get better access to these things and get some background information about the costumed folks. As for Collectormania, that's gone. It's in Birmingham nowadays and is expensive to attend.
Feel a bit bad for the female cos-players who have obviously put tons of time and effort into their costumes but I have no idea who they are supposed to be