The London Underground celebrates its 160 year anniversary this year, making it the oldest underground network in the world.
The whole network began with the Metropolitan Railway which constructed a railway that covered 6km (3.75 miles) and opened on January 10 1863.
The railway proved extremely popular from its first day, carrying 36,000 passengers and more railways were quickly proposed.
Today the Tube handles up to five million passenger journeys a day. At peak times, there are more than 543 trains whizzing around the capital.
The network has expanded to 12 lines and serves 272 stations, making it one of the busiest metro systems in the world.
Ahead of the first anniversary of the Elizabeth line we’ve taken a look at the history of the London Underground lines.
1. Metropolitan line (1863)
Opening in 1863 as Metropolitan Railway, the Metropolitan line includes the oldest underground railway in the world which started the whole of the London Underground network.
2. Hammersmith & City line (1864)
Opening as an extension to the Metropolitan Railway in 1864 with both the Metropolitan Railway and Great Western Railway (GWR) operating services across the line, the Hammersmith and City line provides a vital connection between the east and west of London.
3. District line (1868)
Opening in 1868 as the Metropolitan District Railway (MDR), the District line was initially intended to be connected to the Metropolitan Railway to provide a circular railway that encompassed the centre of London.
4. Northern line (1890)
Opening in 1890 as the City and South London Railway (CSLR) and in 1906 as the Charing Cross Euston and Hampstead Railway (CCEHR) the Northern line is the product of the amalgamation of two separate railways.