As the fine denizens of London Town know, each tube line has a distinct personality and range of mood swings. The Victoria Line for example, breezy and reliable. The Jubilee Line, the young disappointment of the family, branching out to the suburbs, eternally having extensions planned, twisting round to Greenwich, and back under the river out east somewhere. The District and Circle Line, well, even Death would rather fork out for a taxi if he’s in a hurry.