Now that's very interesting, because one "J Richardson" who fits is the famous art historian, John Richardson. He was born in 1924 (perhaps a little young to win the under 18 title? but then older boys might have joined up) and went to Stowe School in Buckinghamshire...Paul Buswell wrote:I don't have any more forenames, but Richardson was a scholar in Buckingham, if that gives any clues.
None of the online biographies mention chess, let alone winning a British Championship.
He's still alive, as far as I know.