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,
Wembley Park tube station Wembley Park tube station Wembley Park is a London Underground station in Wembley Park, north west London. The station is served by the Underground's Metropolitan and Jubilee Lines and is in Travelcard Zone 4. It is located on Bridge Road (A4089) and is the nearest Underground station to the Wembley Stadium and Wembley Arena complex. This is where the Jubilee line from Stanmore diverges from the Metropolitan line which was formerly a branch of the Metropolitan Railway and was taken over by the Bakerloo line and today part of the Jubilee line. The station currently has six London Underground tracks,