Sad news. John was a consummate aviation professional and bloody nice with it. On one occasion I was even fortunate enough to fly with him in G-VTOL. Since the 70s we have exchanged Christmas cards and many of his had me in stitches over his drawings. In many ways his passing is yet another event that marks the end of a remarkable period in aviation history when aeroplanes and flying were something special. John had a different style to Raymond Baxter but both were world class at what they did.
JF