Thanks Bobby, had a good day: got a tube pass and went a few places (Greenwich, Harrods, Notting Hill market). There's just so many things to do, it would take a week's stay in London just to get round them. I was amused by the museum at the Greenwich observatory - the story of John Flamsteed, the first Astronomer Royal, sounded familiar to me:
a) his funding was crap so he had to spend half his research time teaching;
b) half his instruments didn't work or were badly built;
c) He had Issac Newton on his back demanding results every week, and
d) then Newton went and published the results as his own!
Not much changes in the world of research