The UK Passport Office workers launched a five-week stoppage on Monday as strike action spreads throughout the country.
The Public and Commercial Services union (PCS) accused the government of treating public sector workers unfairly, amidst a wave of industrial action affecting a range of professions including ambulance staff, rail staff, doctors, teachers, and dock workers.
Union members say that they have been hit hard by a combination of inflation and stagnating wages, leaving them struggling to pay their bills.
The PCS General Secretary, Mark Serwotka, accused the government of failing to hold meaningful talks with civil servants and ignoring their demands for better pay, jobs, pensions, and conditions.
Over 1,000 members of the PCS are due to take part in the walkout, with picket lines mounted outside eight sites.
A nationwide walkout of more than 130,000 civil servants is also planned for April 28.
The UK government has rejected demands for significant pay hikes, citing concerns about affordability and inflation.
However, teaching unions and health unions have recently reached agreements with the government to hold talks on pay.
