A homeless London man is exhibiting his photographs of the capital's 321 underground and railway stations, including this picture of Liverpool Street station. John Colley, who lives in a hostel run by homelessness charity St Mungo's, is showing the pictures at the Bread and Roses pub in Clapham, south-west London.

Colley said of his work: "London may be the most photographed city in the world. My goal is to record places in a more personal way. Every urban space has a value and identity; in each photograph, I try to portray that identity, and reflect my feeling at the moment I took the photograph."

His 321 Spaces exhibition is on until 7 October.