Metal pioneers rock through the ages

IF the people around you start dropping their clothes as veteran English rock group Def Leppard tears into their anthemic 1987 hit Pour Some Sugar On Me, don't panic. "I have seen people start to act like strippers when that song comes on - even guys!" muses the band's guitarist, Phil Collen, over the phone from California where he now resides.

Formed in 1977 and often credited for leading a new wave in British Heavy Metal, Def Leppard also has Joe Elliot on vocals, Vivian Campbe…