Thanks everyone! This is great, you're really giving me some great places to start.
Sounds like the consensus is that the rain won't be too much of a hindrance, that is encouraging
I'll play it by ear taking into account the weather, but I like the idea of taking a walking tour with London Walks. Thanks for pointing me that way treznor
Now I have to go look into all these ideas I've been presented with!
Sue
No problem, happy to help. I've been here a year now and done a large portion of the London Walks tours, at least the ones that seem interesting to me. I've only found one that was a dud and I knew it probably would be going into it (The Harry Potter walk... aimed too much at kids, but I was bored).