I was driving at about 20mph on the near side of a suburban main road in bright daylight when a K-reg Audi suddenly pulled in front of me and stopped. I applied full ABS brakes but just hit his rear nearside. He claimed to be pulling into his house, situated on a parallel service road with joining lanes at intervals. My car has superficial paint damage, repairable with a touch-up at home. His car, however, had a long, severe dent along the rear side (but with no paint of my colour that I noticed). We exchanged names, addresses and insurers. He was quite heated and blamed me, but as he was much taller and younger than I, I said little. His insurer was Tradex, which I see is for car dealers, taxis, couriers etc. Is it likely this is an attempt at insurance fraud, and what are my options? He and I were both alone in our cars.