In the cellars of some of the world’s most luxury-loving connoisseurs is growing a unique form of investment, wine. David Banford, director, The Wine Society of India, discovered this in 1976 aboard the QE2.

At the captain’s table he experienced the delights of the 1967 Chateau d’Yquem then selling for $30 a bottle. "I bought myself a case," he says.

"Since 1975 was a good vintage in Bordeaux , I bought a first growth Bordeaux Chateau La Tour."

Today, Chateau d’Yquem 1967 is probably $24,000 a case or $2,000 a bottle, he adds. "It’s difficult to justify opening one to drink, but what an investment it proved."

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