jecasc - 8:18 pm on Jul 11, 2011 (gmt 0)
I don't know the specifics of UK internet and copyright law. However I know that in most EU countries there are laws for this kind of problem that state that as provider of an internet service like a blog, forum or wiki you are only responsible from the moment you are notified of a users copyright violation and you only can be held liable for inaction to remove infringing material.
So I'd recommend to do some research if such a provision exists in UK law. I would not be surprised if that where the case, since for most of this stuff EU directives exist that are then implemented into local law.