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,
Brixton tube station with refurbishment of a number of smaller retail outlets and the ticket office. The scheme developed the Practice's expertise in the particular technical and design requirements of underground facilities, benefitting the design approach to projects for other clients such as Network Rail. The refurbishment started in 2001, and was completed in 2010. The station was briefly closed for asbestos removal in 2006. The refurbishment works were a long drawn out process. New panels and lighting have been installed in the escalator shaft. The station is in Brixton Road and is about 100 m from Brixton railway station (on the London