Leader of the Kent Opera Orchestra in the 1970s, and of Roger Norrington’s London Classical Players and Andrew Parrot’s Taverner Players from 1977 until 1992. As a soloist and chamber musician he has a sizeable discography, winning a Gramophone Award, two Danish Grammys, a Preis der deutschen Schallplattenkritik, and a MIDEM Award. He was Professor for Violin and Chamber Music at the University of Music in Dresden from 1999 to 2014. John has given innumerable lecture-recitals, including for the European String Teachers Association, in English and German. In 2004 he was Regents’ Lecturer at UC Berkeley, USA.