Beer workers at the Carling plant in Burton-on-Trent, are to hold a strike ballot later this month.
The union Unite claims more than 400 staff at Molson Coors could be sacked after June 10, and reinstated on less pay.
The union says nearly 200 workers could lose as much as £9,000 a year in wages.
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The museum and art gallery will remain closed until 2018 to make way for its new makeover.
It will be turning cloudier from the west in the afternoon.
Mostly dry, bright and mild. Some rain during the evening.