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 is spelled both with and without an apostrophe. "King's Cross" is used in signage at the Network Rail and London Underground stations, on the Tube map and on the official Network Rail webpage. It rarely featured on early Underground maps, but has been consistently used on them since 1951. "Kings X", "Kings +" and "London KX" are abbreviations used in space-limited contexts. The National Rail station code is "KGX". The area of King's Cross was previously a village known as Battle Bridge which was an ancient crossing of the River Fleet, originally known as Broad Ford, later Bradford Bridge. The