I agree with smacking the chav-scum ferrets, as the judicial system in this country is a joke, & all they'd get would be telling off, but you have gone one step over the mark, IMO, & have actually ROBBED them, which is a serious offense. I hope they don't track you down, for your sake.
People usually get in more bother than the thieves, when they attack them, defending their property.
Don't get me wrong, they got crunched noses, which is what they deserved, but I can't believe you got your property back, & robbed them, too!!!

Hope there's no CCTV!!!