My car was parked outside Tesco's enterance as I had walked into the shop to get some lunch. I had a friend in the passenger seat who stayed in the car and the other friend came In with me. I then came out of Tesco's to see my friend standing at the rear of my car stating that someone had reversed into my car with their silver ford galaxy and driven off without stopping, he also said he had a description and the plate.. I thought great, had a look and it's about £1500 worth of damage including parking sensors... Got back in the car and chased after the guy as he had apparently only just left. My friend described the driver to be a male and 40 - 50 ish balding and the passenger the same but female and blonde. He also said that the driver looked back quickly whilst driving away to see wether or not his plate had been taken indicating that he knew what he had done. Went straight to the police station after getting cut up by a lorry and not being able to follow to report the incident and following that reported it to my insurance company. There are according to the police four possible drivers for the car and one of which has already claimed he was not involved.. Tesco's CCTV that could see everything apparently not working on that day. So here I am with a car that's damaged to the value of £1500 and at the moment one out of four drivers claiming that they were not involved. Dont know where to go from here.. Other than to let the police do their job? Advice would be appreciated.