Brewery workers at Molson Coors in Burton-on-Trent have voted in favour of strike action in a row over pay.
Unite said its members at the site backed walkouts by 97%, but no strike dates have been set to allow peace talks to be held.
The union claims the 455 workers at the brewery plant face having their pay and conditions cut.
"Clearly we are disappointed by today's announcement. However, this vote does not make strike action a certainty given that negotiations are ongoing.
We continue our engagement in meaningful consultation with Unite and its members so that we come to a solution that supports a competitive future for Burton brewery and is fair to our employees."
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