David Gentleman has been drawing London all his adult life, and for the past year has spent his days focused on looking afresh at the city. The resulting book of sketches, drawings and watercolours, arranged month by month, shows a year in the life of London and reveals the city that is hidden in plain view. From its surprising expanse of sky to the crushed closeness of the tube, from Rainham Marshes to Hampstead Heath, David Gentleman gives us London on a human scale