Tony Iommi’s band is topping the charts again after 43 years. Black Sabbath are better known for the antics of on/off lead singer Ozzy Osborne than the skills of its guitarist. But Iommi is one of the original members of the band and has always remained with the band. Despite missing finger tips that can make playing painful, a rock'n'roll lifestyle lived to the full, and now cancer, the 'king of the heavy riff' is still recording and touring around his treatment. Shaun Ley asks, what keeps him playing?(Image: Tony Iommi of Black Sabbath announcing their first new album in 33 years. Credit: Getty Images)