Civil servants are demanding an £18 per hour minimum wage, pay rises of at least 10 per cent, and a shorter working week.
Members of the PCS union, which represents workers across Whitehall, are also calling for a minimum London weighting of £5,000 per year.
The demands were included in a motion passed by delegates at the union's annual conference in Brighton this week.
It also calls on PCS bosses to 'use all available methods to get the union ready for a fight' with the Labour Government, raising the prospect of possible strike action.
The motion states the union's leadership should 'proceed to a ballot by no later than mid-September if there is not satisfactory progress made' over its key demands.
