The Environment Agency has withdrawn staff from flood-hit Wraysbury in Berkshire after they suffered "abuse", the GMB union has said.
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Brian Cullinan's error led to La La Land being mistakenly announced as the Best Picture at the Oscars.
The Food Standards Agency said the product can be returned "from where it was bought for a full refund."
The car giant said it would cut 1,160 jobs at the plant in Bridgend.