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,
The Tube Music Network of educational and informational programming per week, as well as any Emergency Alert System tests and bulletins. The Tube would air the animal-and-music program "Wildlife Jams" to meet the E/I requirements. The rules would later be changed, requiring the main channel to air more E/I programming in relation to how many subchannels that the station operated and how much "free programming" they offered. On October 1, 2007, The Tube ceased operations due to "financial limitations". In early 2008, the company had three separate shareholder class-action lawsuits filed in Florida making financial improprieties claims. The Tube Music Network The Tube Music