There has just been an appeal on local radio by the Road Investigation Unit for witnesses to this incident. Not the actual collision (they have witnesses for that); they are looking for information about the car and driver. It was a dark coloured, new (less than six years old) VW Golf. If you can help, please call them on 020 8285 1574. If you wish to remain anonymous, call Crime Stoppers on 0800 555 111. I think they are hoping that someone has notice a damaged car answering that description, either parked locally or booked into a garage for repair. The elderly victim has suffered severe head injuries and has a broken leg.