car insurance problem .. please help?

[Novak V]

please help me as i am in problem, here in the uk i parked my car on the road and went to shop,after abt. 30 mins when come back n see somebody hit my car from back n it slided on snow n hit somebody else car parked in front of me, i dont know who hit my car but, driver of the car which been hit by mine claming insurance on me n my insurance gonna be high if i let him do as its not my fault. is there any way out??? thanks in advance