Losing no claims after no fault accident?

Someone ran into the back of me at traffic light when I was stationery. It was at very slow speed and there was no damage to either car. I had to report the accident because I have a company car but the insurance company did not have to pay anything out on the claim. I am now insuring my own car and have asked my company for a letter confirming no claims. Am I likely to lose no claims years because of this accident even though the insurers didn't make a payment?