Paul Brannigan has a professional relationship with Dave Grohl stretching back almost 15 years: "I would consider the two of us to be friends," Grohl told Brannigan when the pair last spent time together in Los Angeles. Brannigan is the former Editor of Kerrang! - the world's biggest weekly music magazine - and his writing on punk rock, grunge and hard rock have also appeared in the world renowned Q and Mojo magazines.