Members of the fire union have overturned a recommendation from their leaders to accept a final pay offer.
Delegates at a recalled Fire Brigades Union (FBU) national conference voted to reject the offer.
The deal would be worth 16 per cent over three years, linked to changes in working practices.
The proposals deal will now be discussed by firefighters across the country over the next two weeks, before another national conference decides whether to accept the deal or continue with industrial action.
The FBU's general secretary, Andy Gilchrist, had argued that the offer was the best available in the current political climate and was worthy of recommendation.