It is hard to find bad champagne, given how tightly regulated the grape and wine production is in a region famous for quality grapes.

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It is still not clear exactly which grape variety is growing on Robben Island, but Mr Jonker believes the quality will be high, and is now trying to research the world of charity auctions.

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Winery SF is one of several that have opened here, including Fat Grape, which specialises in zinfandel, syrah and sangiovese with no added sulphites, and Vie, which makes high quality, limited-production Rhone varietals like mourvedre and syrah.

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