Who told Derek: 'You've got glasses, a duffle coat and a beard - you're obviously a leftie' ?

In this Sofa Session Martin Parr is in conversation with photographer Derek Ridgers - best known for his striking portraiture of the young people who formed many music subcultures of the 1970s and 1980s. Martin and Derek touch on Derek's experiences photographing skinheads, as well as him being branded as a 'leftie photographer' while photographing in the clubs and on the streets of London. Filmed and edited by Alexander Parkyn-Smith.