Black Sabbath retired following an extensive farewell tour from 2016 to 2017. The shows featured three of the band’s four founding members – singer Ozzy Osbourne, guitarist Tony Iommi and bassist Geezer Butler – but not original drummer Bill Ward, who pulled out of the band several years earlier due to a contract dispute.

One million fans tune into livestream of Ozzy Osbourne tribute concert - All-day event has seen a number of metal acts, including Metallica, Guns N Roses, Alice in Chains and Tom Morello, take part in