The civil service union PCS is almost certain to join the unions striking on 14 October over pay.
Local government workers who struck on 10 July are already set to strike again on 14 October. This time they may be joined by health workers also demanding pay rises.
Health workers’ wages have dropped in real terms every year since 2009, and between 12 and 15 percent since 2010.
This year 60% of workers are offered no rise, and others get one percent.