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,
St. Paul's tube station tube station to provide an interchange between the London Underground Central line and National Rail services on the Thameslink (route) has been suggested by London TravelWatch in a report in 2014 which suggested it would benefit passengers travelling from the Central Line catchment to Gatwick and Luton Airports. St. Paul's tube station St. Paul's is a London Underground station located in the City of London financial district. The station, which takes its name from the nearby St Paul's Cathedral, is on the Central line, between Bank and Chancery Lane stations, and is in fare zone 1. It should not be