Central line (London Underground) Central line (London Underground) The Central line is a London Underground line that runs through central London, from , Essex, in the north-east to and in the west. Coloured red on the Tube map, the line serves 49 stations over , which makes it the longest Tube line. It is also one of only two lines on the Underground network to cross the Greater London boundary, the other being the Metropolitan line. One of London's deep-level railways, Central line trains are smaller than those on British main lines. The line was opened as the Central London Railway in 1900, crossing
London Electric Railway of the Bakerloo line, Northern line and Piccadilly line. London Electric Railway The London Electric Railway (LER) was an underground railway company operating three lines on the London Underground. It was formed in 1910 and existed until 1933, when it was merged into the London Passenger Transport Board. The LER was formed and owned by the Underground Electric Railways Company of London (UERL) in 1910 to combine the management of three of the company's subsidiary deep-level tube railway companies: the Baker Street and Waterloo Railway (BS&WR), the Charing Cross, Euston and Hampstead Railway (CCE&HR) and the Great Northern, Piccadilly and