Joseph Mallord William Turner continues to occupy a singular place in British cultural consciousness. The English Romantic artist, watercolourist and printmaker – often referred to as ‘the painter of light’ – elevated landscape painting to high art and, when he died in 1851, left a legacy of 550 oil paintings, 2,000 watercolours and 30,000 works on paper. When one of these surfaces at auction, it sells for tens of millions of pounds. However, most of his works – with the power of nature, the sea and the industrial revolution as central themes – were bequeathed to the nation. A collection of 300 oil paintings in the Clore Gallery, at Tate