Civil servants have threatened to strike unless they are given a four-day week and a 10% pay rise. The Public and Commercial Services union (PCS) will launch a vote for industrial action from October 20 over pay and conditions for its members.

This will include โ€œprogress towards a four-day working week with no loss of payโ€. Mike Wood, shadow minister for the Cabinet Office, said: โ€œTaxpayersโ€™ money should not be wasted on this. But it is no surprise that unions feel emboldened to take this action, having been empowered by Labourโ€™s Employment Rights Act.

โ€œLabour ministers must make clear that they do not support a four-day week on full pay for civil servants and stand firm against any strike action.โ€ Former local government secretary Steve Reed previously ruled out a four-day week for public servants.

But the PCS said evidence showing the economic and social benefits of a four-day week was growing โ€œever more convincingโ€.

There are two ways the four-day working week can operate. The first is when the hours worked in a five-day week are compressed into a four-day week, meaning longer working days.

The second approach involves working fewer hours than the traditional five-day week but with no reduction in employee pay.

William Yarwood, campaigns director at the Taxpayersโ€™ Alliance, said: โ€œThe four-day week is a grift pushed by special interests that would leave hard-working taxpayers paying full price for fewer hours and worse services.

โ€œMinisters should kill this idea stone dead and demand proper productivity from the public sector.โ€

The PCS will need at least half of its members to vote, with a majority of these voting for the proposed strikes.

Angela Rayner last year made it easier for civil servants to strike by removing a requirement that at least 40% of the total workforce voted for action through the Employment Rights Act.

The PCSโ€™ Dan Durcan said: โ€œCivil servants have a responsibility to be objective. The evidence about the economic and social benefits of a four-day week grows ever more convincing.

โ€œPCS members will soon vote on taking industrial action on a four-day week. This could result in one of the most significant changes to working life in the UK in over a century.โ€

A Cabinet Office spokesman said: โ€œThe Government is committed to recognising the hard work of civil servants, while ensuring public sector pay remains sustainable.

โ€œDiscussions will continue with Civil Service unions, including PCS, as part of departmentsโ€™ ongoing engagement.โ€