Hector McIver (pictured above) produced the play
David Platt was older than Karl Miller and I don't know what happened to him. Karl Miller was Dux of the School and became editor of "The Listener" and later was editor of a London literary magazine-the London Review of Books, which he founded.
He also wrote several books some of an autobiographical nature, recalling quite a bit about his Edinburgh youth, the School and in particular about Hector whom he remembered with great affection as to some extent do I as he was an unforgettable and charismatic teacher.
Karl Miller was also a member of the Championship winning Royal High team in the Top Of The Form radio quiz
Many thanks to Garry Ross for supplying this material