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,
London King's Cross railway station London Underground station's Piccadilly line platforms. The escalator burnt up and much of the tube station caught fire with smoke spreading to the main line station, killing 31 people. In 1987, British Rail proposed building a new station with four platforms for international trains through the Channel Tunnel, and four for Thameslink trains under King's Cross. After six years of design work, the plans were abandoned, and the international terminal was constructed at St. Pancras. British Rail completed electrification of the East Coast Main Line to Leeds and Edinburgh between 1985 and 1991, and the current InterCity 225 rolling stock