A year later, they'd slimmed down, found a new name and invented heavy metal. Few bands are so inextricably linked with a musical genre, but Sabbath set the template for everyone from Motörhead and AC/DC to Metallica and Guns 'n' Roses.

In the wake of Ozzy Osbourne's passing, Zak Starkey has shared his regret for once turning down an offer to sit behind the kit for Black Sabbath.