The longest escalator on the Underground is at Angel tube station on the Northern Line, only an escalator at Heathrow Airport is longer in the UK in fact. They are the fourth longest in Europe . The escalator is sixty metres long and rises just over twenty-seven metres . The escalators were installed during a rebuild of the station in the early 1990s.
|And down again!|
 Paul Moss, London Underground (Haynes, 2014) p. 158
 Jason Cross, London Underground Guide 2017 (Train Crazy, 2017) p. 99