Commuters trapped on Tube train

An investigation was under way today after commuters were trapped on a broken-down Tube train. Passengers were forced to spend more than an hour in the dark after the Jubilee line train broke down just beyond Swiss Cottage station.

Tube chiefs have ordered an inquiry into how the train failed. They insisted passengers would have been led off the vehicle earlier if the breakdown had happened in the summer, when temperatures on the Underground can top 36C - well over the legal limit for transporting animals.

The incident happened at 8.30am at the height of the rush hour when the power failed on the southbound service.

Engineers fought to correct the fault but were unable to repair or move the train.

Another train at Swiss Cottage was evacuated and used to shunt the broken-down service back into the station.