Last year, at the age of 81, illustrator David Gentleman, best known for his platform-length murals at Charing Cross station, set off with little more than a shoulder bag containing watercolours, paper, brushes and a small camera, to spend a whole year exploring London on foot, with occasional trips on the Tube and by bus. The result is London You’re Beautiful: An Artist’s Year, a month-by- month, densely packed, visual account of what he observed.