I've met a couple of politicians too, Hilary Clinton once , she was obviously stupidly busy but stopped for a quick chat, I was wearing a leicester hat when I met her but unfortunately she did not ask about it.
I stood on the same escalator as David Cameron once, even from a distance he seemed smarmy and as a kid we went on a trip to the houses of parliament with school and David Blunkett was there, he seemed a little irked that all of us 7 year olds were more interested in his guide dog