Thousands of commuters were left stuck on underground trains yesterday on the hottest day of the year so far after an entire shutdown of the Jubilee Line.

Five trains filled with passengers travelling after work were stranded between Kilburn and Canary Wharf shortly after 7pm due to a power failure.

Passengers endured sweltering temperatures, some for over an hour, before being evacuated along tracks and through tunnels and paramedics were dispatched in case any passengers were suffering from dehydration.

A TfL spokesman said: “We would like to apologise to passengers for the disruption to services caused by a power failure on the Jubilee Line.

“Local ambulance services were despatched as a matter of course and staff worked to detrain all passengers as quickly as possible.

“No passengers required medical assistance.”

There were further delays on the line on this morning after a signal failure at Baker Street led to a suspension between Willesden Green and London Bridge stations.

The line is currently running with minor delays.