Andrew, it is worth pointing out to those who don't know that it is off-peak all weekend, peak / off-peak divisions only apply Mon-Fri.
No worries Simon, I've only managed to get out one day so far.
If there is still anyone worried about photographing in London, don't be, on Sunday I saw so many people snapping away at anything and everything with compacts to SLRs. I even sat on and around a bench at Liverpool St Underground for over an hour taking snaps and wasn't bothered (and I can look pretty dodgy).
Of course, this is not a guided walk, we go where we go with just some general waypoints. However, I am a little confused about the Saturday, I'm thinking Borough Market for lunch and.... (I really have no idea, as long as it is not Picadilly Circus, Oxford or Regent Street or any form of museum). Please help me out, I'm just a banished Brummie.