At a recent family reunion, my friend's partner backed into my car in torrential rain - before I'd even moved - causing serious damage to my car. He shot off at great speed, driving in a highly dangerous manner (according to some of our party who were in the car with him) back to our accommodation without getting out of his car to check the damage. I checked the damage and arrived back about 20 minutes later to find he had gone to bed. I didn't want to spoil the party and assumed with all the witnesses there would be no problem with blame so left it until the morning. I was working the next morning so had to shoot off, I had a quick word with his partner who said not to worry it could be sorted later. However shortly after I got a letter with a totally concocted story saying I ran into him and that I was totally to blame. Everybody at the scene agrees this was not the case and has issued statements to that effect. This was 18 months ago. I've paid to get my car back on the road (£1500), his car needs about the same. It appears the insurers accept his version of events and do not recognise all of my witnesses evidence as it is from family and close friends. What can I do to stop this injustice?