Another good one is that when you are going through and empty your pockets of the loose change, they give you a little container to put it all in. Once you are through the detector they pick up the cup and empty your change into your hand. Most people just put it in their pockets.
Perhaps I was living up to my name but I was watching the guy very closely, he had managed to get two £1 coins in his hand and slightly bent his fingers to hide them. I turned his hand over, opened his fingers and retrieved the money.

It isn't the point that it is only £2 but the fact that even at the airport the tourists were being ripped off. Having lived here for 5 years I don't consider myself a tourist any more and was really angry. The guy just shrugged his shoulders, smiled and said sorry.