London Underground and the mechanisms are regularly degreased to lower the potential for fires. The only wooden escalator not to be replaced was at Greenford station, which remained until October 2015 when TfL replaced it with the first incline lift on the UK transport network. There are 426 escalators on the London Underground system and the longest, at , is at Angel. The shortest, at Stratford, gives a vertical rise of . There are 184 lifts, and numbers have increased in recent years because of investment making tube stations accessible. Over 28 stations will have lifts installed over the next 10 years,
Borough tube station Borough tube station Borough is a London Underground station in the Borough area of the London Borough of Southwark in central London. It is on the Bank branch of the Northern line between Elephant & Castle and London Bridge stations. It is in Travelcard Zone 1. The station entrance is in Borough High Street (part of the A3), on the corner of Marshalsea Road. The A2 terminates opposite it. The station was opened on 18 December 1890 as part of the first deep-level tube railway, the City and South London Railway (C&SLR), and was rebuilt in the 1920s when the