Royal mail workers in Bridgwater, Somerset, have voted to strike for three Saturdays starting 29 June.
Workers are striking over changes to the pay and conditions of 120 workers.
They are members of the CWU union.
The result of the union’s national ballot over Royal Mail privatisation was due out as Socialist Worker went to press.
The CWU has also called more strikes in its ongoing Crown Post Office dispute.
Workers are set to strike for half a day on Thursday of this week and a full day on Saturday 29 June.
The walkouts by around 4,000 workers in 373 Crown post offices will be the sixth and seventh strikes since Easter.