Tube passengers are enduring hellish commute on Friday morning (November 25) as the Piccadilly Line is partially suspended.
Transport for London (TfL) said there is no service between Acton Town and Uxbridge because of a shortage of trains, and has warned of severe delays on the rest of the line .
At 8.35am it told passengers they cannot guess when the problems will be resolved.
Fed up commuters spent their time waiting on train platforms by taking to Twitter to vent their frustrations and anger.
TfL is advising customers travelling to stations between Rayners Lane and Uxbridge should use Metropolitan line services.
It also said London Underground tickets will be accepted on Chiltern Railways, Great Western, Southern, London Overground, London Midland and local bus services via any reasonable route.
TfL added the morning rush hour problem emerged after "more than the normal number of trains came up for essential maintenance".
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