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,
Escalator etiquette Escalator etiquette Escalator etiquette is the etiquette of using escalators. In many places, there is a convention that people should stand on one particular side of an escalator to allow other people to walk on the other side. A 2015 experiment by Transport for London has suggested that such a convention sometimes reduces the efficiency of escalators: the number of people carried can increase if people stand on both sides. The first escalators installed in the London Underground at Earl's Court station used the design patented by Charles Seeberger. These did not let the passengers dismount in the direction of