He is foreign, did you read the article?
He is studying at a Welsh University and came to visit London for the day. I'm actually starting to feel a bit sorry for him now, it's not like he just parked there.
The ticket thing certainly was pretty rubbish, as surely the Police were still around when he returned. Plus I'm sure they must have left some kind of information on it if they had done.
Westminster Traffic Wardens though are pretty much programmed to try and ticket any vehicle they can though.