I found this from an articles interview with a tube driver:
The first four weeks were spent doing theory, followed by 17 weeks of stock training – learning about the trains from the inside out. "The trains on every line are different," says Jiles "The Northern Line trains were introduced in 1995, Jubilee in 1997 and Bakerloo in 1972. You learn every inch of the trains – every switch, every mechanism, so if something goes wrong, you can fix it."
Next came learning to drive the trains. Trainee operators can practise on a simulator (the public can try one out at the Transport Museum in London's Covent Garden), but because the underground system is so busy, there is no opportunity to learn by driving empty vehicles: you go straight from simulator to an in-service train complete with passengers, albeit with an instructor at your side. Jiles points out, with a smile, that the instructor can always press the red emergency button to stop the train if things go wrong.
Trainees have to learn all the signals, all the possible shunts – everything about the line they are working on. This is no mean feat: Golders Green, for example, has about 50 possible shunting positions. Driving lessons last for three months and each trainee has to complete a minimum of 100 hours before taking their test. Every part of the training is examined, and if the trainee fails, he or she goes back to scratch. The driving test alone lasts eight hours.
How many of you still think a chimp can walk in with a few hrs of training and do the job.... yeah right