Our favourite UK Art institution, the Tate has a blockbuster programme lined up this Autumn. At Modern, a review of how Pop Art was not just an american, but actually also a global phenomenon is followed by a (literally) moving retrospective of the great Alexander Calder. While at Britain, an exhibition by a man widely recognised to be our greatest living painter, Frank Auerbach. Mr Auerbach is still pulling no punches at 84.