The bodies of Mr Cain, a father of one from Whitehill, and Mr Clarke, from Liss, were found in an apple storage area where nitrogen is used to preserve fruit.

BBC: Blackmoor Estate deaths: Tributes paid to farm workers

At Auvil Fruit, an apple and cherry grower in Orondo, Washington, operations manager Walter Hough says the company used to lose up to 20% of its fruit to mold and spores as it sat in cold storage for up to eight months.

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