5x15 July 1 2013

The ever-enjoyable 5x15 event, at which five speakers each speak for 15 minutes on a chosen topic, returns. The line-up features Alan Johnson discussing his Notting Hill childhood, Deborah Levy muses on her writing, Beau Lotto provides optical illusions, Claire Messud talks about 'the woman upstairs', and Marcus Du Sautoy revels in the magic of numbers.