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 CCTV footage released by police shows them browsing in the shop minutes before stealing two bikes.
It will be warm on Saturday, with a risk of thunderstorms.
It will be warm with an increasing chance of heavy showers.