Arty Smarty

Get under the hammer at: Sotheby’s / 34 New Bond St, W1 / T: Bond St / 7293 5000 / sothebys.com; Christie’s / 8 King St, SW1 / T: Green Pk / 7839 9060 / christies.com; & Phillips de Pury / 30 Berkeley Sq, W1 / T: Green Pk / 7318 4010 / phillips.com.