There’s a black and white photo, a little grainy and slightly out of focus, of Igor Stravinsky greeting Mstislav Rostropovich at the Royal Academy of Music, London, in June 1964. Standing in the background in the upper left hand corner is a tall lanky figure, a 20-year-old music student named John Tavener. Also in the photo, just to the right, is John’s brother Roger who was friendly with Ringo Starr. Roger had done some building work on Ringo’s house.