“Can you hear the sound of an enormous door slamming in the depths of hell…?”Not only is this the chilling description given of a nuclear detonation during one of the sound-bite samples on the first Discharge album, but it’s also a perfect description of the Stoke, UK-based punk band that turned the world of underground music on its head with their primal bursts of uncompromising speed and aggression. Formed in the late Seventies Discharge changed the face of punk – and indeed extreme music its...