UK passport office workers launched a five-week stoppage Monday, the latest walkout in strike-hit Britain as the country reels from the worst cost of living crisis in a generation.
The Public and Commercial Services union (PCS) accused the government of failing to deal even handedly with public sector workers.
The UK has been hit by a wave of industrial action across the economy in recent months ranging from ambulance staff and rail staff to doctors, teachers and dock workers.
Unions say their members have been hit by a combination of decades-high inflation and stagnating wages that has left them struggling to pay their bills.
Ministers had failed to “hold any meaningful talks” with civil servants despite negotiations having been opened with unions representing health workers and teachers, PCS general secretary Mark Serwotka said.