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,
Gants Hill tube station Gants Hill tube station Gants Hill is a London Underground station in the largely residential Gants Hill district of Ilford in East London. It is served by the Central line and is between Redbridge and Newbury Park stations on the Hainault loop. It is in Travelcard Zone 4. It is the easternmost station to be below ground on the London Underground network and the busiest on the Hainault loop. The station ticket hall is located beneath Gants Hill roundabout and reached via pedestrian subways. It opened on 14 December 1947 as an extension of the Central line to form the