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
Yiwu–London railway line Yiwu–London railway line The Yiwu – London Railway Line is a freight railway route from Yiwu, China, to London, United Kingdom, covering a distance of roughly 12,000 km (7,500 miles). This makes it the second longest railway freight route in the world after the Yiwu-Madrid railway line, which spans 12,874 km (8,000 miles). It is one of several long distance freight railway routes from China to Europe on the "New Eurasian Land Bridge" and part of establishing a modern-day Silk Road. The route was opened on 1 January 2017, making London the 15th European city to have a railway route