Eight months after the opening of the major exhibition, the man who responsible for staging the controversial show says it mattered because it reflected an unprecedented scale of art-making in Britain

In 1967 the National Portrait Gallery in London did not own a portrait of the monarch—but commissioning one was to prove a challenge

As show opens at the Royal Academy, we ask what drives Saatchi to buy and risk so much, using access to his collection's archive to chart a 25-year transformation in his taste