Date opened 1863
Annual passenger numbers 1.35 billion
Length of network 402km
Busiest station Waterloo - 100.3 million passengers per year
Annual train km travelled 83.6 million km
Average train speed 33kph
Proportion of network in tunnels 45%
Longest continuous tunnel East Finchley to Morden (via Bank) - 27.8km
Total number of passenger escalators 440
Station with most escalators Waterloo - 23
Longest escalator Angel - 60 metres
Shortest escalator Stratford - 4.1 metres
Total number of passenger lifts 188
Number of moving walkways Four, two each at Waterloo and Bank
Deepest lift shaft Hampstead - 55.2 metres
Shortest lift shaft King's Cross St. Pancras - 2.3 metres
Step-free stations 76
Station with most platforms Baker Street - 10
Highest station above mean sea level Amersham (Metropolitan line) - 147 metres
Furthest station from central London Chesham (Metropolitan line) - 47km to Aldgate
Longest distance between stations Chesham to Chalfont & Latimer (Metropolitan line) - 6.3km
Shortest distance between stations Leicester Square to Covent Garden (Piccadilly line) - 0.3km
Longest direct journey Epping to West Ruislip (Central line) - 54.9km