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,
Debden tube station considerably and this has reduced the number of trains terminating at Debden. The present station buildings on the eastbound platform largely date from a reconstruction in 1974, although the original stationmaster's house survives adjacent to the ticket office. In 2018, it was announced that the station would gain step free access by 2022, as part of a £200m investment to increase the number of accessible stations on the Tube. London Buses routes SB09, 66A, 133, 418, 418B, and 689 serve the station. Debden tube station Debden is a London Underground station on the Central line in the east of Loughton,