Dr. Tanner, who taught philosophy at Cambridge fore more than three decades, was perhaps best-known as the opera critic for The Spectator, which has published this obituary. He also wrote on topics in value theory, and on Nietzsche and Schopenhauer. Comments are open for remembrances from those who knew Dr. Tanner or for those who wish to comment on the significance of his work.
(Thanks to N.G. Krishnan for the pointer.)