A TORY assault “worse than the 1980s” will lead to huge losses for workers if unions do not co-ordinate strike action, Civil Service union PCS leader Mark Serwotka will warn today.

His grim words follow indications that the Civil Service could see a 100,000 further job losses in the next five years after PCS faced unprecedented union busting from service chiefs during the last Parliament.

In an address to his union’s annual conference, Mr Serwotka will call for trade unionists to learn the lessons of the 2011-12 pensions dispute, during which co-ordination between public-sector unions broke down.

“We had joint action, but never agreed joint demands or a joint strategy,” he will say.

“It is clear that after that election result many people will be feeling demoralised and afraid.

“In times like this there are two options — fight or fright (sic).

“It will be tough, but by working together, building alliances with other unions and social movements, we can do it.”

Senior civil servants’ union the First Division Association told the Financial Times that it expected austerity measures to put an end to even more Whitehall jobs than the 90,000 claimed by Con-Dem coalition.

Departments are already drawing up their cuts proposals for a savage spending review in the autumn.

Attacks on union organising in the Civil Service, which leaked documents have revealed are part of a covert strategy to undermine PCS, are set to continue, with plans to end union dues check-off set to be rolled out in three more departments.

Labour had pledged to end the attack on check-off, under which members’ subs are automatically deducted from their pay packets, if it won the general election.

In an article for the Star today, Mr Serwotka urges unions to put the broader interest of the labour movement first, warning of “ominous signs” of division and membership poaching.

“Division and competition are the death knell for any fight to win concessions from the Tories and their likeminded allies in industry,” he writes.