Anger at years of pay freezes and attacks on the union is driving the civil service walkout, set to take place on Wednesday of this week.
The workers, in the PCS union, have had pay frozen for two years and a pay cap of 1 percent.
Tories also want to withdraw check-off collection of union subscriptions—an attempt to undermine workplace organisation.
“We are under sustained attack,” PCS national executive member (pc) Marianne Owens told Socialist Worker.
“But the mood is there for a fight.
“We can see it in the local disputes that have taken place this year in museums, in Land Registry and now at Garston call centre”
PCS members at a Department for Work and Pensions call centre in Garston, Merseyside began a five-day strike from Monday of this week.
Some 41 pickets lined up outside the call centre, which is under threat of closure, on Monday morning.
“The battle is not just a one day strike,” said Marianne. “We will be looking at further action and also promoting the fighting fund to bring out local offices in dispute.”