Thanks for the comments. I'll drop the council a line with his number plate. I'd be quite happy if he got a shirty letter from someone. The most stupid thing was his car was parked right next to a bin but he chose to throw his rubbish on the floor instead. My wife once saw a woman throw her Travelcard on the pavement. She said, sarcastically, 'I think you just dropped that by mistake'. To which the woman said 'It's ok, I don't need it anymore'.