Maintenance workers on London Underground have voted to strike "following numerous unresolved breaches of agreed machineries and agreements by management".
The RMT union said the strike was supported by 67 per cent of its members.
RMT general secretary Mick Cash said: “This level of flagrant abuse and ignorance of long-standing policies and procedures is unacceptable and the anger among RMT Fleet grades members is clear following this overwhelming mandate for strike action and action short of a strike,” he said.
RMT's executive will now consider the vote before any potential action is confirmed.
A TfL spokesperson said: “We urge the RMT leadership to work with us constructively on the issues it has raised rather than threaten unnecessary industrial action.”
The news comes as Londoners already face travel disruptions starting on Tuesday night. Central line and Waterloo & City line drivers belonging to the RMT and Aslef unions will strike in protest over the “forced” transfer of eight drivers to different depots.
Peter McNaught, operations director for the Central Line, said in a statement that the strike was "unnecessary".
He added: "We have made all reasonable efforts to resolve this dispute through talking through the issues with the unions and we have minimised the number of employees affected from over 30 to eight.
"All of these moves are within the long-standing agreements we have made with the unions.
"We urge them to engage with us to resolve this issue and to withdraw the strike action, which will only cause needless disruption to Londoners.'
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