A geographical theme, in which Oliver and Richard discuss natural factors and how they influence the ability of grapes to grow and of wine to be made. Oliver opens up the 30-page Chez Bruce wine list and starts to sweat; later he spins his globe and studies the ’30-50’ latitude strips of the northern and southern hemispheres, with Richard explaining why these numbers are important for making wine. Richard talks about good vintages and the effect of our warming planet on vintages in traditionally marginal climates like the Loire Valley and Burgundy. They then taste a chardonnay from a cool desert region of Chile (close to ‘30’) discuss the ‘Anything but Chardonnay’ movement, before landing on plump fruit and haunting aromatics in a Loire Chinon (close to the ‘50’). Oliver learns the value of swirling his glass and overcoming his belief that such behaviour is pretentious.