London Underground infrastructure Tube Programme, investigating replacing the trains for the Bakerloo and Piccadilly lines, is looking for trains with better energy conservation and regenerative braking. The Underground serves 270 stations. Fourteen Underground stations are outside Greater London, of which five (Amersham, Chalfont & Latimer, Chesham, and Chorleywood on the Metropolitan line and Epping on the Central line) are beyond the M25 London orbital motorway. The longest distance between two stations is between Chalfont & Latimer and Chesham on the Metropolitan line. The shortest distance between adjacent stations is the between Leicester Square and Covent Garden on the Piccadilly line. The station furthest
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