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23 October 2013, 16:15
Union leaders have called for an investigation after the doors of a packed London Underground Tube train opened between stations.
The Rail Maritime and Transport union said a baby in a buggy was close to the door that partially opened on the Piccadilly line train on Sunday 20 October 2013.
The union said the incident raised questions about the reliability of the trains, which it said were 40 years old but were not due to be replaced for another decade.
Nigel Holness, LU's operations director, said: "Safety systems immediately alerted our train operator after a Piccadilly line train travelling to Heathrow on Sunday was found to have two doors slightly open.
"The operator brought the train to a halt, checked the doors and ensured they could be fully closed before the train was taken to the next station where it was taken out of service. The safety of our customers and staff is our highest priority and the train remains out of service while we carry out an investigation."
RMT general secretary Bob Crow said: "Clearly, there now needs to be a formal and detailed investigation conducted at the highest level as this is not the first time our members have reported door malfunctions on the ageing Piccadilly line fleet."