The Treasury’s demand for government departments to find 6% cuts threatens 25,000 jobs, the Public and Commercial Services union says.

The union has again called for chancellor Philip Hammond in next week’s budget to reverse George Osborne’s cuts after more than six years of failed austerity.

The Treasury announced last night it had asked departments to draw up plans for “savings” of up to 6% to meet £3.5 billion in extra cuts announced by Osborne in the 2016 budget, on top of those previously set in the spending review.

The union says this alone could mean up to 25,000 job losses.

Since 2010, 110,000 jobs have been cut from government departments.

In the two largest civil service employers, HMRC is planning to shut all but a dozen of its 170 UK sites and cut thousands more jobs and DWP says it plans to close one in 10 jobcentres.

PCS general secretary Mark Serwotka said: “More than six years of Tory austerity has meant pay cuts and job losses for tens of thousands of public servants and wrecked services we all rely on.

“The chancellor must use the upcoming budget to reverse George Osborne’s failed plan, end the job cuts and lift the pay cap to put money back in people’s pockets and improve living standards.”