This commemorative cover was issued by the Methodist Philatelic Society to commemorate the 95th birthday of Revd. Lord Donald Oliver Soper, Baron Soper of Kingsway (1903-1998). Soper was a Methodist minister, a socialist and also a pacifist. In 1953-54 he served as President of the Methodist Conference.
See also the Philatelic Society's commemorative cover issued in 1993 to mark Soper's 90th birthday in the Online Collection.