There used to be Andrés Segovia, Narciso Yepes, the Romero brothers, Julian Bream and Tony Blair's pal, Paco Peña, never far from a television screen. The Australian John Williams outshone the lot in flower-power shirts, electro-pop fusions and movie deals. Classical guitar set the tone for The Deer Hunter and A Fish Called Wanda. It was cool to strum classical, for a while. And then, like all fads, it died for want of a defining personality. John Williams is 67 this month, with no successor in sight.