The historian and presenter on his new book about 12,000 years of British art, BBC philistinism and Banksy’s ‘money-making machine’.

Travel across Scotland, Wales, England, France and Italy in Christie’s Dramas of Light and Land: The Martyn Gregory Collection of British Art online, from 10 to 24 March.

The exhibition at Turner's House, the painter's former retreat in Twickenham, south-west London, opens on 6 July. Joseph Mallord William Turner was born in London in 1775 and became what many ...