Thank goodness neither you nor your son were hurt.
I had a similar accident last year on the 25th of July as I was stationary at the approach to a roundabout, when 2 examples of young British low life in a Ford Fiesta who were not looking where they were going used my M3W as a brake and ploughed right into the back of me.
The body was severely damaged to the point where a completely new body was required but it happened to be the week of the MMC annual shutdown. So instead, I had the car taken to the dealer from whom I had purchased it (Williams Automobiles) and they fitted the new body. The rebuild cost (parts + labour) was in excess of £18,000.00.
I got the car back in the middle of December because of delays initially created by the third party's insurers and then by the supply problems of getting a new body.
This was not helped by the fact that mine is an early car (2012 chassis) and the latest bodies are not a direct fit because of changes to the more recent chassis.
I hope it gets resolved for you to your satisfaction as quickly as possible.
Good luck with it all but I think you will sadly miss the end of the summer.
