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
Attacks on the London Underground He was sentenced to 15 years imprisonment later in the month. On 15 September 2017, an improvised explosive was detonated at the Parsons Green station at around 8:20 am. The homemade bomb produced what witnesses called a "wall of fire", resulting in 22 injuries, primarily burns. Ahmed Hassan was tried for attempted murder in March 2018. He was convicted and sentenced to life imprisonment and must serve a minimum of 34 years. Attacks on the London Underground This is a list of deliberate attacks on the infrastructure, staff or passengers of the London Underground that have caused considerable damage, injury