I really should have gotten up earlier this morning. By the time I got to Westminster Abbey, the line was about two blocks long. So that's tomorrow - earlier!
I'd been planning on the tower in the afternoon, so I went there. It's a lot larger, so a few thousand tourists (exaggeration only mild) don't entirely clog it. Though the ticket line seemed almost half an hour.
And I ran into my first few fans going round all the towers in the Tower, so now it's really a Worldcon.
Since My morning was shortened, I still had some day left, so I went to Forbidden Planet. It was sorely disappointing. If I were into limited edition action figures, or $30 unexciting t-shirts, but I'm not. the books are markedly more expensive than in the States, and they don't do used. However! I ran into David Hartwell and he told me that there's a little street in front of the Museum called Cecil Court where the bookstores are, so that's tomorrow afternoon's target.