Severe delays on the Piccadilly line due to a shortage of trains look set to continue during rush hour this evening.
Transport for London (TfL) said the disruption, which is affecting the entire line, was caused by industrial action by staff at a Tube depot. TfL also urged commuters to avoid using the Piccadilly line and find an alternative route.
Tony Matthews, the Piccadilly line's general manager, said: “I apologise to customers for the delays this morning. This is due to a temporary shortage of trains caused by industrial action by some of our staff at one of our Piccadilly line depots. We have reached an agreement with the RMT union and we expect the industrial action to be withdrawn."
Tickets will be accepted on London Buses, Greater Anglia and Great Northern via any reasonable route TfL said.
There are also delays on the Bakerloo line due to emergency engineering works at Piccadilly Circus station earlier today.