They were driving over the speed limit and over-taking on the approach to a roundabout? If so, then I think they deserve to get their car smashed to bits - it's the only way some people learn..
He is driving a "Child Killer" Audi Diesel. He cant claim compensation from Audi because he was dumb as fuck for buying an Audi because the salesman said it was "Eco Friendy" so now he takes it out on everyone else on the road. Enjoy the loss of value of your piece of shit A5 you utter cunt.
You should have hit the back of his van. The camera was the evidence to what he had done, he would lose his job and all would be well. Stop being the good driver and put these fucking loser drivers in their place.
Cash for crash? Hope someone can get video evidence ;)