Workers at Weetabix in Corby and Burton Latimer will go on strike in the New Year in a row over shift patterns.
A breakdown in discussions between the cereal producers and union Usdaw led to a vote over industrial action, with more than 90 per cent voting to go on strike.
The industrial action will affect both Northamptonshire Weetabix workplaces, with the first day of action taking place in the New Year.
Each strike day will run for 24 hours with no more than one strike to take place in a single week.
Usdaw’s area organiser Ed Leach said: “Despite long and detailed discussions, the company has so far refused to offer a suitable financial incentives for employees who have moved shift or will be expected to move on to the new 24/7 shift pattern.
“As a result of the failure to agree, Usdaw conducted a ballot for industrial action and members have overwhelmingly backed a series of 24-hour strikes.
“It is deeply regrettable that the company has pushed staff to this point and we hope that they will look again at their offer, continue to negotiate with us and seek a solution that will avoid the industrial action backed by our members.”
A Weetabix spokesman said: “We are disappointed by the ballot result, but respect the decision and are keen to continue discussions.
“We have plans in place to minimise any potential disruption to our operations.
“Changing consumer breakfast habits have increased demand for biscuit production, and with the engagement of USDAW we have introduced new shift patterns and created new permanent roles at Burton Latimer and Corby.”