Only just read your thread and I am furious about what happened to you, I would have called all my friends and recruited as many cachers as possible to track down the chav who did the deed and then pay him a mob handed visit at his home, I would then select the most officious person to "ave a word" while the rest stood about in an intimidating silence. I could not "ave a word" myself because I would definately be tampted to give him a slap. In the part of London that I originate from
"ave a word" means to set someone straight and leave them in no doubt of the consequences i.e Make them defecate themselves.
Slap usually means a trip to A&E
I am not local but would be there if you decide to go this route, just keep me on a short lead, Cheers Jon