Ian's given heads-up about a TV programme on National Geographic tonight that shows how they did it. It's part of a series called "Monster Moves".
The Waterloo and City line doesn't have a rail connection to any other part of the London Underground or mainline network, so the only way of moving the 20 carriages and equipment was via a shaft on Spur Road.
So if you've ever moaned if you had to take out doors and windows to move large sofas, you've had it relatively easy. Also hopefully those Laurel & Hardy stylie piano movers from Chiswick might be able to take some lessons too.