Yesterday I happened upon a tweet from a New Zealander who wondered how well London had been cleaned up for the Olympics and, specifically, whether Trafalgar Square's legendary pigeon poo remained an issue.
Being a first-timer at the Olympic Games and in London, I had no reference point that didn't exist in books, films, or television shows; my lasting image of the city is that of an alien spacecraft crashing through the tower housing Big Ben before plunging into the Thames.
I haven't checked yet, but the clock tower is probably fine.
A series of bylaws passed over the last decade have largely consigned Trafalgar Square's avian annoyance to history, and I saw more "don't feed the pigeons" signs than actual pigeons. Sadly, there is still plenty of waste to be found in this ancient city.
I visited the New Zealand High Commission to admire their impressive silver fern banner and to meet a staff member I had come to know via Twitter. Even though I didn't require any diplomatic aid, I was offered something just as valuable: an invitation to use the loo before I left.