The first escalator on the London Underground was installed in 1911 between the District and Piccadilly platforms at Earl's Court and from the following year new deep-level stations were provided with escalators instead of lifts.
Den første rulletrappe i London Underground blev installeret i 1911 mellem District- og Piccadilly-perronerne på Earl's Court, og fra det følgende år blev nye dybeliggende stationer udstyret med rulletrapper i stedet for elevatorer.