this is true, A m8 of mine who is a joiner, was working in the city centre, worried he would get a ticket he decided to write a note and placed it at the front of the windscreen, he wrote joiner working inside, So the traffic warden could see it, anyway he finished what he was doing inside, and came back to the van, only to see a ticket behind the wiper, he was angry, he open the sealed package to see what he got fined, only to see another piece of paper with it, with a hand writen message that said, traffic warden working outside lol the cheeky sod,