I may be in London for a couple of hours during the day on September 29th, depending on how much extra time I get at Heathrow.
On my way back from Singapore, I'll arrive in the evening of Friday, Nov. 4th, and depart the next evening for Oslo (see the itinerary).
That means I'll try to meet up with people I know in London, eat a late dinner, and stay the night with someone with a spare room or at a semi-random hotel.
London is so civilized that I expect this is where I'll lose my wallet and passport, just because I'm not watching them too closely anymore. 