Metropolitan Line: No service Wembley Park to Amersham/Chesham/Watford and Uxbridge due to power supply problems caused by snow ALSO no service Wembley Park to Aldgate due to planned engineering work. London Underground tickets will be accepted on local bus services.
Stalled train at Ruislip Manor due to dual ACM failure
Actual Control Machine. These were installed at the front of each train in 2037 and provides actual control to the train; instructions when to start, stop and so on. Previously known as a "train operator".