In short, it's a collaborative effort between a host of heavy metal legends of all ages and sub-genres. Since metal's inception everyone has found a different facet to latch on to and now a load of the pioneers are getting together a one-night experience.

One of the many All Stars coming to Brixton is Dream Theater's James LaBrie who says, in an online video, that he'll be playing not just his solo material but some DT tracks too - imagine LaBrie teaming up with the likes of Cronos or Chuck Billy for a Dream Theater cover.