The Waterloo & City line is the amuse bouche of my 11 course tube challenge. The line itself is both the youngest* and shortest on the network. At only 1.5 miles (2.5 km) long and consisting of just two stations (Waterloo and Bank), I was able to walk the whole thing in about a half hour. A nice easy start.
However, everything did not quite go according to plan. The original idea was to both ride and walk the line on the same day. I set off on a beautiful sunny Sunday (Aug. 19th, 2012) walking to Waterloo from South Ken. Normally the Waterloo & City Line is closed on Sundays. However, Transport for London (TFL) moved to a 7 day a week schedule for the line during Olympics.
I naively assumed that this applied to the whole period from the opening ceremonies of the Olympics to the closing ceremonies of the Paralympics. Even TFL's website seemed to indicate the line was going to be open. So I was somewhat surprised to find the whole thing shut down. Really not a big deal, but it meant I had to make a separate trip a few days later to ride the train.