If I can get to Hammersmith by twenty to one in the morning I can make the very last train into Richmond. So leaving anywhere vaguely central in town at 12.30 would give me ten minutes to get to Glamoursmith, which just isn't going to happen.
When I went to the UK bloggers party I left a zone one part of central London at about 12.15 or 12.20am and got to King's Cross to find all the last trains had gone and then had to get a night bus home which meant I eventually got home at 3am. This was on a Saturday night.
So is the tube ever going to be a way of getting home for late nighters who don't live in zone one or zone two?