Civil servants will stage a 24-hour strike on Budget day today, in a row over pay, pensions and working conditions.
It is thought up to 250,000 members of the Public and Commercial Services union (PCS) will join the walkout, which will hit job centres, border control at airports, tax offices and courts.
A half day of action has also been called on April 5th, as part of a three month long campaign of action.
Picket lines will be placed outside government offices, museums, galleries and the Houses of Parliament.
Civil servants have planned a second walkout in a row over pay, following their Budget day strike.
Almost 250,000 members who work in government departments and its related bodies will hold a half-day walkout on April 5, the Public and Commercial Services union said.
A 24-hour stoppage has been called by the union on Wednesday after accusing the Government of refusing to negotiate over cuts.
A three-month programme of industrial action is also being planned, along with a fresh campaign against tax avoidance and evasion.