The Police just rung? They want you to stand in for Andy Summers?
(sorry, bad joke)
That involves quite a few criminal records then (particularly the solo albums)
What I will say is that if previous experiance is anything to the chav will turn up really late, in the hope that if the witnesses don't turn up the court will dismiss the case.
My sons court case (he was assulted by a couple of chavs) had the person (term used loosely) in question turning up 2.5 hours late then pleading guilty. The other 2 victims didn't even bother turning up.