Blaming his departure on arcane traditions is so far from the truth, it merely smacks of the kind of inverse snobbery in which some newspapers like to indulge: "toff school scorns state-educated head" etc, which your own sub-heading echoes.
This prejudice against private schooling is rife amongst educationists; the first, and not the last time I faced it was when I - private school and Oxbridge- educated - applied to be a teacher.
The exact words were: "So what's a refined person like you doing training to become a teacher?" It is a shame that The TES perpetuates this attitude to "venerable" institutions and their alumni instead of celebrating what they achieve.
Head of English, St. Marylebone (state) school, 64 Marylebone High Street, London W1