I had a great time. I was staying with friends in Pimlico, London and the only time I ate out was on Monday, at a gourmet burger joint just off Carnaby Street. The person I ate with had no problems, so the cause remains a mystery. It's most likely I caught a flu bug despite having had the flu shot.
It certainly was chilly there, but try -16°C (-27 with the wind-chill taken into account) here in Toronto. At least it's sunny which brings some consolation I suppose.