Several London Underground stations are closed due to workers striking while two Tube lines are halted because of a casualty on the track.
Transport for London marked seven stations on the network at 7am due to the Transport Salaried Staffs' Association action.
They are staging a fresh 24-hour strike in a dispute over terms and conditions from Friday and are banning overtime until May 5.
The union said the action was likely to cause Tube stations to close at the last minute, including into Saturday morning, but Transport for London said there will not be significant disruption.
Those closed are marked as Barbican, Caledonian Road, Camden Town, Highgate, Kentish Town, Pimlico, Regent’s Park, Temple and Vauxhall.
The Tube's Hammersmith and City line is suspended as emergency workers respond to a casualty on the track.
The incident has also closed the District line between Tower Hill and Upminster with severe delays on the rest of the line.
