It is easy to forget, after all these years of Christmas hits, frilly shirts and evangelical Christianity, that Cliff had actually begun his career as the UK's most credible mass-market rocker. Hardcore rock fans might have preferred the gritty rockabilly of Vince Taylor or, a little later, the flamboyant R&B theatrics of Johnny Kidd And The Pirates, but as far as the mainstream was concerned, Cliff was It.