Had this numb nuts, do this to us on a roundabout whilst wife was driving, he did it deliberately because he felt 30mph in a 30 zone was too slow and he thought he'd "learn us" as the chavs say.
reported to Police, said I'd got video, they said, and I quote "can't do anything the CPS won't touch it as its your word against his, we can't use in car video for traffic offences" so that answers that question then.
anyway here's what the nob did