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,
Angel tube station extra-wide southbound platform, surfaced over the original 'Island' platform which had accessed both North and Southbound trains from a central landing, and features the longest escalators on the Underground network. and the fourth-longest escalators in Western Europe. It is a candidate station on the proposed Crossrail 2 line from north Surrey and south-west London to south-east Hertfordshire. On Islington High Street, the station provides access to several nearby Off West End or Fringe theatre venues including the Old Red Lion Theatre, Sadler's Wells Theatre, the King's Head Theatre and the Almeida Theatre. It is the nearest station to City University's