Filmmaker Lee Shulman, founder of The Anonymous Project, has spent years collecting almost 800,000 colour slides from members of the public. His new book, When We Were Young, records memories of growing up in Britain between the 50s and 80s: picnics beside cars, ice creams at the seaside, paddling pool dips, even a baby’s first sip of stout… These richly emotive images are at once unknown and deeply familiar, and looking at them is akin to discovering an old relative’s long-lost photo album.