Polaroids The Photographers' Gallery: 4 Saints in 3 Acts - A Snapshot of the American Avant-Garde Whitechapel Gallery: Artists' Film International: Gabriela Golder and Wojciech Bakowski London auctions Sotheby's: EFTA00708042 Howard Hodgkin. Portrait of the Artist Tue, 24 Oct (viewing 20-23 Oct) Design: Li