Commuters suffered the “rush hour from hell” because of fresh delays to services, a union leader has said.
The Waterloo and City Line was suspended, signal failure disrupted the Victoria Line and the Jubilee Line was hit again by disruption on Monday.
It followed delays to the Jubilee Line on Friday when a section was shut for two hours.
The Rail Maritime and Transport (RMT) union said the Tube had become a “sick joke” that was failing passengers.
Bob Crow, RMT general secretary, added commuters had suffered the “rush hour from hell”.
Transport for London said Monday's Jubilee Line delays were caused by signal failures at St John's Wood and Dollis Hill.
Mayor Boris Johnson was reported to have demanded an immediate report from his transport commissioner, Peter Hendy, following Friday's disruption.
via BBC News London