| A Central line train at Lancaster Gate | |
| Background | |
|---|---|
| Locale | Greater London, Chiltern, Epping Forest, Three Rivers and Watford |
| Transit type | Rapid transit |
| Number of lines | 11 |
| Number of stations | 270 served (260 owned) |
| Daily ridership | 3.23 million (approximate) 3.66 million (weekdays) (approximate) |
| Website | www.tfl.gov.uk/tube |
| Operation | |
| Began operation | 10 January 1863 |
| Operator(s) | London Underground Ltd; part of Transport for London (TfL) |
| Technical | |
| System length | 402 kilometres (250 mi) |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) Standard gauge |
| Electrification | 630 V DC Fourth rail |
London Underground maps Image
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