Steve McQueen puts his stamp on the National Portrait Gallery

Diane and Walter Douglas, the parents of Corporal Alan Douglas, who was killed in Iraq, inspect a postage sheet that bears the face of their son Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk Diane Douglas and her husband travelled down from Aberdeen to help put pressure on Royal Mail. 'I hope it happens, that everybody buys stamps, so it will be a reminder,' says Mr Douglas Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk Roger Bacon gazes at the face of his son, Major Mathew Bacon, who was killed in Iraq in 2005 Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk As with all the other families of the lost soldiers on display, Roger Bacon himself chose which photograph to use (the soldier on the nearside is not his son) Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk A row of McQueen's framed postage sheets Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk The artist with his work Photograph: Dan Kitwood/Getty Images Photograph: Dan Kitwood/guardian.co.uk