At just 21, folk star Laura Marling is already three albums into a career built on furious talent and untempered ambition. She talks to Laura Barton about her new album A Creature I Don’t Know Laura Marling sits at her kitchen counter, small and pale in an Iron Maiden T-shirt, and smokes a cigarette in the mid-morning sunshine. The pack of Camels, the heavy metal shirt – both seem to serve as gentle reminders that the darling of the British folk scene is perhaps not quite what you might expect; allusions to the fact that while, in person, she may appear poised and still and quietly reserved, in song, she is a different animal