RMT is to ballot members over proposals to introduce driverless trains onto London’s Tube network.
In July, the rail union leaked an internal LU document which showed possible plans to transfer the Jubilee Line to driverless operation within three years, with the scope for other deep level tube lines to follow.
RMT general secretary Bob Crow said: “RMT reiterates this union’s complete opposition to driverless trains. Every train must have a driver, to ensure the safe and effective running of the Underground.
“Plans to scrap drivers or reduce their driving duties are risking safety, services and jobs and are motivated by saving money and undermining trade unionism.
“We will be campaigning for a massive yes vote in this ballot and with further packages of tube staffing and service cuts expected to be unveiled by the Mayor and TfL shortly.
“RMT is on high alert to use every weapon in our armoury to resist attacks on our members and the safe running of the tube network.”