I had an 8yr old kid fly into the road and under my 110 on his mountain bike in the summer. very very scary. I feel for all partys, including the chav. although i hate chavs you have to ask yourself if you would feel just as angry if it was a woman in a vectra that hit him at the same speed, prejudice is not an easy thing to avoid, bear in mind that chavs are car enthusiasts too, and like a lot of us, like to express themselves through their cars, which is usually a posotive thing even if the expression of them is rank. Im sure most of us have had the odd erratic driving moment, luckily for the majority of us there wasnt a kid about to stumble into the road at the time.
As much as i hate chav's he is not entirely to blame, might not be to blame at all if it turns out he was not over the speed limit. no doubt he will still get raped by his insurance company for any mods he didnt tell them.