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
History of the London Underground Brompton and Piccadilly Circus Railway that had authority for a tube from South Kensington to Piccadilly Circus. The District's plans were combined by Yerkes with those of the Great Northern and Strand Railway, a tube railway with permission to build a line from Strand to Finsbury Park, to create the Great Northern, Piccadilly and Brompton Railway. In April 1902, the Underground Electric Railways Company of London (UERL) was established, with Yerkes as chairman, to control these companies and manage the planned works. On 8 June 1902, the UERL took over the Metropolitan District Traction Company. The UERL built a large