just seen this , had a problem much the same , iam on 24 hour call so got to be a real pain well as we do a lot of police work ie recovery removing accident damaged cars etc had a word with a friendly cop the highways act states it is illegal to park in such a way as to stop you gaining access to the highway ie if you cant get off a drive then they are illegally parked but not illegally parked if its stopping you from getting on to your drive ! the last part seems a bit strange but that's what the highways act states