Read our pick of the best London art exhibitions to see this month, from The Face Magazine retrospective at The National Portrait Gallery to Alvaro Barrington at Sadie Coles HQ.

In the summer of 1957 Derrick Greaves helped open the exhibition Looking at People at the Pushkin Museum, Moscow, organised by Paul Hogarth with Soviet funding. Greaves, Hogarth and Ruskin Spear cut ...