Getting back to OP, as he was cycling to work and seems to have a credit card he doesn't appear to be a child and as such is responsible for his own actions. If he ends up in court he may well get a court ruling against him which will remain on his financial record for a long time. £300 is not a very large sum considering the damage mentioned and [much as I hate to say it] I really don't see why the taxi driver should be made to suffer if the accident was not his fault. Braking hard is NOT a crime and following vehicles, [of any type] should allow room to stop, end of story. That many don't is neither here nor there, if you stop and a car runs into your rear the police if called will not be interested in an excuse of "well he stopped so I ran into him".
Had this been the other way around I'm sure we would have had lots of replies howling for the driver to be hanged from a lamp post. Cyclists can cause accidents and if they do they should stop crying "foul, it's not my fault" and pay up.
I realize this may upset some folk but this is a real world with real resposibilities. Motor insurance became mandatory and if cyclists don't take this on board some form of cycle insurance, be it on household or specific will too.
I do sympathize with what was in the end a mistake but as I said had it been "a mistake" the other way around would anybody have any sympathy for the driver ?
Thanks sidevalve, thats pretty much how we viewed it.
To continue the tale, we spoke to a couple of friends of friends with legal background, and were advised that there may well be a case of loss of earnings should the driver persue an insurance claim. The driver also refused to accept the offer for my son to pay by credit card for the repairs after they were done, as in fairness how can he rely on that happening, he only has our word for it. In the end the 'legal-ish' advice was pay up asap and hope to avoid escalation which could get much more expensive, so I'll be living on gruel for a couple of months and have transferred the cash to my son. We have reduced the risk of any comeback by getting the driver to sign a disclaimer for 'full and final settlement' etc. Its not perfect but seems to us the best compromise, it was my son's fault as others have noted! Last news is the driver met my son, signed the disclaimer without a squeak and took the cash. He was in his scratched car and my son noted that he had indeed scored through the paint quite enthusiastically on two separate panels during his journey across the car, so as some have noted it seems a pretty reasonable quote from a reputable bodyshop to fix.
The moral of this tale for us is ride defensively and make sure you are covered, I wonder how many folks reading this have not even thought about insurance? It hadn't occurred to us, its quite chilling to think what could happen if you are really unlucky, and cycle insurance is not a lot for the peace of mind it brings.
Thank you to all who have replied with constuctive and sympathetic advice. I'm new to the forum but I have had a nice warm fellow humanity feeling of support through your feedback, it is much appreciated.
Tubs