"I've lived in London for more than quarter of a century now, and this is the first time I've ever been on the day's first train. It's something I'd often wondered about, though, from both a practical and a romantic point of view. The practical question was a simple one: if the transport network isn't running in the early morning, how do the people who operate it get to work? How does the driver get to the train, if there are no trains to take him there? The answer is prosaic: they get there by minicab. The cabs travel a prescribed route to the various depots on the District line, picking up staff en route as they head to Upminster, Earl's Court, Ealing Common, Barking and Hammersmith. Of these postings, Upminster is the most popular, because a large number of drivers live nearby – that's one of the reasons it is, as I was told by a District veteran, the "senior depot". The first train out from Earl's Court in the morning is at 5.21, but to get there, allowing for multiple pickups and some waiting around at the depot, the minicab from the East End starts as early as 2.30 in the morning. That's an early start to a working day."But if the driver doesn't have the taxi parked outside their house, how does the driver get to work? Wheels within wheels.
Travel John Lancaster at The Guardian answers an age old question about the London Underground: