Eleven colours,
one map.

Named for the brown hue that filled the original 1906 timetable. The deepest of the central-area tubes, and the last to be given a New Tube for London train.

↳ Earliest deep-level tube still in operation.

The east–west spine. The longest of the lines, the second busiest, and the first to receive the 1992 stock — the workhorses that still pull the network.

↳ Carries more passengers per kilometre than any other line.

A loop, not a line. Built from cut-and-cover sections of the Metropolitan and District railways. The S7 stock was the first new fleet in over 20 years when it arrived in 2010–17.

↳ Almost never runs as a complete circle — engineers split it at Edgware Road.

The longest of the sub-surface lines. Runs to the leafy edges of south-west and east London, and shares track with the Piccadilly and Hammersmith & City at Ealing Common.

↳ A genuine survivor — 50 of its 60 stations date to before 1930.

The newest of the lines. The first new Tube route in 64 years. Built on the bones of British Rail, with 9-car Class 345s and step-free access at every station.

↳ The only Tube line that opens onto a high-speed rail line.

Once a minor service on the Metropolitan, later a separate operation. The pink line of east London — quieter, faster, but rarely the one you need unless you live in Bow or Barking.

↳ Shares the most track with the Circle line of any route.

The 1979 extension into Docklands was the first new Tube line of the post-war era; the 1999 extension under the Thames made it the only line with 4-platform stations.

↳ The 1996 stock was the first tube train designed for the masses — wider doors, walk-through cars.

The line that started it all. A line, not a tube — 19th-century engineers built it in cut-and-cover. The first on the network, still the longest route north-west of Baker Street.

↳ The only line with a service in the 1950s that runs past Chesham, 25 miles from Charing Cross.

Two deep-level tubes stitched together in the 1920s — the City & South London and the Charing Cross, Euston & Hampstead. The 2020 extension to Battersea was the first in 19 years.

↳ Contains the longest single escalator on the network, at Angel.

The line that runs to Heathrow. The deepest of the sub-surface lines and the fourth-busiest on the network. The 1973 stock is approaching 50 years old and has been retrofitted with new signalling.

↳ Originally three competing companies, merged in 1910 under one manager.

The fastest line on the network — 2009 stock plus Automatic Train Operation give it an average speed over 35 km/h. The line was the first to run ATO from day one.

↳ The only line that was entirely grade-separated at the time of opening.

A tube line in name only — a single 1.5 km tunnel linking two of London's busiest stations. Closed on Sundays for 70 years before 1994. 1993 stock still runs it end-to-end in three minutes.

↳ The shortest line on the network, and the only one with no intermediate stations.