Good luck, I was recently punched in the face by a motorist because I had the nerve to react to their dangerous driving by briefly exclaiming my displeasure. CCTV or a witness needed or it'll go nowhere.

I am now one of those 'annoying' cyclists (my terminology) who will be riding with a helmet camera (that incident was the third in less than 4 weeks that saw me on the plastic surgeon's table after a motorbike sideswiped me, then a pedestrian stepped into my front wheel (on the road cyclist haters) and put me onto the tarmac at 20mph 2 weeks later, with the punch incident two weeks after that). Complete lack of basic respect and accountability shown in all three cases.