Look but don’t touch. As kids, we’re berated by this unenviable axiom, scolded in grocery stores, candy shops, other people’s homes and, perhaps most essentially, the shiny glassware ...

JK Rowling has revealed the inspiration behind the symbol for the Deathly Hallows. Speaking in a new BBC documentary, the author says it's connected to a film that came out more than 40 years ago.