Tube workers are planning a walk out in protest over pensions and benefits next week. The 72 hour strike will last from 4pm next Tuesday 24 April until 4pm on Friday 27 April.
The Rail, Maritime and Transport union (RMT), which represents around 1,000 staff on the Tube Lines contracts has confirmed the action.
The staff work on the Piccadilly, Northern and Jubilee lines and RMT says the strike will have a "widespread" impact on Tube services across the network. The announcement follows a 4-1 vote in favour of industrial action in a ballot of union members.
RMT general secretary Bob Crow said: "Tube Lines has refused to budge and engage in meaningful talks and that pig-headed approach has raised the temperature on the shop floor and has resulted in this strike action being called.
"The union remains ready to talk, and the strong mandate for this industrial action shows Tube Lines and TfL the depth of anger there is over this blatant lack of fairness and justice."
The three days of strikes will happen just ahead of the London Mayoral election and London underground passengers and commuters can expect disruption. To plan alternate routes and see the lines that will be affected, visit www.tfl.gov.uk