Christie's, London, March 3rd 2017. PICTURED: A woman admires David Hockney's 'Sunflowers In A Yellow Vase', painted in 1996, which is expected to fetch between £1.5-2.5 million. <br /> Fine art auctioneers Christies hold a press preview for their Post-War and Contemporary Art auctions to be held on March 7th and 8th.
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