The world is facing a 'chocolate drought', according to an expert, whose warning is prompted by fears that the globe's sustainable cocoa supplies could be exhausted by 2014.

Political unrest in the Ivory Coast, the source of almost half the world's cocoa beans, has depleted the number of cocoa farmers there. Many have fled the country or are smuggling the crop into Ghana, where it is selling at a far higher price, says British chocolatier Angus Kennedy.