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,
Earl's Court tube station successful it was considered a "'joy-wheel'", however, following this a "spiral escalator was installed at Holloway Road tube station [...] but was never used". A new station building on Earls Court Road was constructed to a design by Harry Ford in 1915. The Warwick Road entrance was rebuilt in between 1936 and 1937 in the modern brick and glass style being employed by London Underground at the time. During World War II, bomb damage to the West London Line caused the closure of the line and the Willesden to Earl's Court shuttle last ran on 2 October 1940. The section