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A Morrisons meat processing factory in Bradford has been evacuated following a chemical leak.

West Yorkshire Fire Service was called to the plant, off Cemetery Road in Four Lane Ends, after reports of an ammonia alarm sounding at 21:00 GMT on Sunday.

Nobody reported any ill effects but staff were sent home from the site.

Morrisons said it had experienced a problem with its refrigeration system which had since been resolved and production had resumed as normal.

The factory produces meat and other savoury products under Morrison's own brand name, Farmers Boy. Its about "4,000 tonnes of fresh produce every week".