You couldn’t invent the story of Nazareth if you tried. At their peak, the Dunfermline rock group were huge, selling vast quantities of albums and pulling in enormous crowds to their shows. By rights, when the group’s profile receded a little and they morphed into the highly respected club-level regulars that they are today, their reputation should have become tarnished – but nothing of the sort has occurred. Nazareth are routinely hailed as that rare thing: pioneers who became legends in their own lifetimes.