Commander Peter Staveley was an ex-naval man who taught French in the 6th form, although I had the impression that he would rather have been doing something else.
Despite that, and despite the fact that he wasn't French, he seemed to teach the language well enough (I still remember a little of it).
I have one isolated memory of a French class in the 6th form. We were reading a French Canadian story of a past century, called Les Compagnons de l'Arc en Ciel, in which there was a Red Indian woman called Wahiah. One day two boys arrived late for the class. They burst through the door into the room, and one of them announced, "Wahiah!"
Jonathan Marler remembers that the Commander was “a consummate gentleman and very interested in the welfare and education of the boys. He taught me how to row and he awarded me my rowing badge. I remember his speaking of his submarine days and teaching me the Valsalva manoeuvre, among other things.”