I hope they take the cleanup, repair and policing costs out of the student budget. If it is important enough to the students to protest then I think they should be prepared to foot the bill.

Would it not make sense for organising bodies, in this case the NUS to have to put up a good conduct bond before there public meeting. If it passes of peacefully they the money is returned. If not it is used to cover the costs. This would encourage organisers to keep things under control.

I mean you cannot organise any other type of event without paying for public libality insurance.