Commuters are facing difficulties on the Central Line this morning due to a signal failure in east London.
Transport for London said there were "severe delays" on the line, and blamed an earlier signal failure at Mile End station.
Londoners trying to use the Central Line took to Twitter to vent their frustration, with one user calling on London mayor Sadiq Khan to "sort out" the busy commuter route.
— Dawn Burnett (@DawnBurnett) October 17, 2016
Central line right now pic.twitter.com/NZCnwAr8H1
— rory * (@meyou_what) October 17, 2016
WHY IS THERE NO CENTRAL LINE TRAIN FOR ANOTHER 13 MINUTES. WHAT IS THIS.
— Nat Guest (@unfortunatalie) October 17, 2016