Tony Iommi is the lone member of Black Sabbath to appear on all 19 of the studio albums. In fact, 1986's Seventh Star was initially meant to be an Iommi solo record before last minute pressure from their label led it to being released under the Black Sabbath moniker.

Having influenced scores of metal guitarists, Black Sabbath's Tony Iommi confessed to seeing any attempt at mimicking their pioneering sound as a futile task.

Alongside Black Sabbath reuniting, the gig will play host to performances from dozens more icons of the genre, including sets from Metallica, Slayer and Anthrax, as well as the likes of Pantera, Lamb Of God, Mastodon, Alice In Chains, Halestorm and recent Grammy Award-winners Gojira.