When David Byron left Uriah Heep in 1976, the band’s fans figured he’d be irreplaceable. His dynamic vocal range was an important part of the Heep sound, after all. The band found a replacement in ex-Lucifer’s Friend vocalist John Lawton and to everyone’s surprise, the resulting album – 1977’s ‘Firefly’ – was not only enjoyable, but a big improvement over the workmanlike approach which dominated most of 1976’s ‘High & Mighty’. This was an achievement considering the band had lost a key member, but pretty amazing since they also had a new bass player in tow. ‘Firefly’ also marks the first appearance in Uriah Heep for Trevor Bolder (best known for his work as bassist with David Bowie’s Spiders From Mars).