TUBE workers will strike in protest at ticket office closures and safety concerns, a union has announced.
The Transport Salaried Staffs' Association (TSSA) says its members voted overwhelmingly in favour of the walk out.
The Rail Maritime and Transport Union (RMT) will also ballot its members in a row over the closure of ticket outlets and the use of agency staff.
Gerry Doherty, TSSA general secretary, said: "The size of the vote clearly demonstrates what our members feel about what they perceive as an attack on safety standards and the casualisation of safety-critical work.
"We hope that London Underground now recognise that feeling and will reach a sensible agreement with us which ensures that London has the safest Tube system in the world."
Transport for London insist the issues have nothing to do with safety and jobs are not at risk.
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