I was punched in the back of the head during a football match about 6/7 years ago. The force broke my cheek bone. (I was walking away at the time after a fair enough tackle, but the guy was getting more and more frustrated at me getting the better of him)
They guy was sent off by the referee and he promptly got in his car and drove of while I was out cold. His team wouldn't disclose his name, and he had given a false name to the referee.
I had to drop out of an intensive fast track uni course (I was 2 weeks into it and my face was like a balloon and couldn't talk/eat/think without having severe pain), they guy was never identified, and I spent a week of summer in hospital and months of discomfort.
Someone from the police let me know about criminal injuries compensation and I successfully got awarded £2k. But tbh, I would rather the guy had his life affected in an equal manner to that of myself.