Civil servants in the Home Office, Border Force, Department for Transport and Defra are to take industrial action, affecting ports, borders and all areas of transport, in a dispute over pay, jobs and pensions, the PCS union announced.
The union are requesting a 10 percent pay increase, and after meeting with the Cabinet Office this week, these demands were not met.
The Public and Commercial Services union (PCS) said action will start in mid-December and continue for a month.
Some workers will take action for the entire month, while others will walk out for shorter periods.
PCS General Secretary Mark Serwotka said: "PCS members are angry. They helped to keep this country running during the pandemic, and in return, have been treated appallingly by this government.
"With inflation now at 11.1 percent, it is inconceivable that they are expected to cope with yet another real terms pay cut.
"With tens of thousands of members on poverty pay it is no longer about tightening belts, but about choosing between heating and eating – and that is simply not acceptable for the government’s own workforce.
"We have made it clear to the Cabinet Office that we are available for talks throughout this period. I hope that they do the right thing and come back to the table prepared to meet our demands.
"If not, then we are prepared to do what we need to do to show them the value of our members' work once they withdraw their labour."
The PCS is the sixth-largest union in the country, and have around 195,000 members.
Those members in the Civil Service returned a yes vote for industrial action across the areas balloted of 86.2%, the highest percentage vote in the union’s history.
A union spokesman said: "126 employer areas crossed the 50 percent turnout threshold required by law for strike action and returned a majority yes vote.
"We met with the Cabinet Office this week, but they did not make any proposals that address our demands for a 10% pay rise, pensions justice, job security and no cuts to redundancy terms.
"Therefore, the union’s elected national executive committee (NEC) met today and agreed an initial programme of hard-hitting, targeted action in the Home Office, including the Border Force, across the Department for Transport and in Defra, affecting ports, borders and all areas of transport.
"The NEC will be meeting again to consider further strikes if there are no proposals from the Cabinet Office made soon.
"We currently have a significant strike fund and have today taken steps to raise significantly more money to support our members striking for a sustained period and carry the campaign on into 2023 if necessary."