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.

The original line-up of heavy metal legends Black Sabbath will play together for the first time in 20 years at a one-off concert in Birmingham, England, this summer, organisers said on Wednesday. The July 5 show at the birthplace of the band will feature Ozzy Osbourne,