Defective London Underground train delays thousands
A union has spoken out after passengers on the London Underground (LU) suffered delays because of a defective train.
A Victoria Line train southbound from Seven Sisters developed a problem just after 0828 GMT, delaying thousands.
The RMT union, which is in dispute with LU over jobs and has warned about maintenance, said it capped a "month of unprecedented chaos".
Transport for London said the train was a new vehicle which would deliver more reliable journeys on the Victoria line.
Bob Crow, general secretary of the RMT union, said: "We have now had a month of unprecedented chaos on the Tube.
"All of our warnings about cuts to staffing, maintenance and the legacy of privatisation have come home to roost and the underground is lurching from crisis to crisis on a daily basis, with worse to come with more cuts in the pipeline."
A TfL spokeswoman said: "There were delays on the Victoria Line earlier today, caused by a defect with the new trains and signalling.
"The issue was resolved shortly after 9am and the Victoria Line is now operating a good service.
"The train involved was one of the new fleet of Victoria Line trains, operating with the new signalling system, which together will deliver faster, more reliable journeys on the Victoria Line."
RMT members have staged three 24-hour strikes in recent weeks over plans to cut ticket office jobs.
A fourth strike is planned for 29 November. Union leaders have said they have no plans to disrupt services over Christmas and the new year.