Hundreds of workers at the conciliation service Acas have voted to go on strike over pay.
The PCS union, which represents 630 staff at Acas, said 59 percent backed strike action.
The dispute follows delays in settling this year’s pay rise, which was due on 1 August.
Negotiations have not started yet, complained the union, adding that last year’s wage increase was paid 10 months late.
General secretary Mark Serwotka said, “Members have indicated clearly that they are not prepared to accept below inflation pay or a repeat of last year’s ten month delay. Staff are feeling betrayed and management and the government need to act quickly.”
Some 4,500 workers at the Driver and Vehicle Licensing Authority staged a 24-hour strike last Friday in a separate pay dispute.
The walkout was in protest at below-inflation pay offers and wage inequality, which has led to pay gaps of over £2,500 between workers in the DVLA and the Department for Transport.