The company, founded in Sweden more than 50 years ago, produces cartons and packs for milk and juices, as well as food and wine at the Wrexham plant, employing around 265 workers.

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Mr Franzia's firm, the Bronco Wine Company, brings California's excess grapes to its plant in Napa Valley from all over the state. (The firm's use of the Napa name on its labels is, as a result, currently the subject of a lawsuit.) Bronco owns an efficient modern plant and has its own distribution network, so it can deliver wine directly to Trader Joe's warehouses, which keeps costs down.

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There are 400 wine producers in Poland, but most plant only a few acres.

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Grow grapes for wine, and officials must approve everything, from where and when you plant new vines to what information goes on the label you put on the bottle.

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Sir David and Sir Frederick Barclay, who reside on neighbouring Brecqhou and are directors of Sark Estate Management, have previously said they intended to plant 20, 000 vines on their land in Sark and hope to be producing wine by 2014.

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