Tim Adams

The Collection of Peggy and David Rockefeller review – yours for half a billion

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Christie’s, King Street, London
Picasso’s bolshy flower girl is just one of the rare gems to be glimpsed in London before this vast private collection goes under the hammer

Dan Barber’s long-term mission: to change food and farming for ever

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America’s philosopher chef won over a president to his vision of sustainability. And now he’s bringing it to Britain

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