Allan Wynn entered Melbourne University from Wesley College and pursued a very successful academic career culminating in his winning of the Beaney Prize in his final year. He was a RMO at the Royal Melbourne Hospital in 1944 and then served in the RANR as a Surgeon Lieutenant from 1945 to 1947. Following further RMO posts at the Royal Women's and Repatriation General Hospitals, following which he obtained his MD, winning the David Grant Prize, he continued his postgraduate studies in Cardiology in London at the Postgraduate Medical School, at the Hammersmith Hospital where he worked with John Goodwin, and St. Thomas' Hospital.

He was appointed Honorary Physician to Outpatients at Prince Henry's Hospital, Melbourne, in 1952, and subsequently Honorary Physician to Inpatients in 1962 at the same hospital. His publications included "Gross Calcification of the Mitral Valve", (Bri. Heart J. 1953, 15 214), and "The Selection of Patients for Mitral Valvotomy", (Med. J. Aust, 1954, 1, 885-91). Subsequently in his career his major interest became ischaemic heart disease, reflected in his involvement with the National Heart Foundation of which he became Victorian Medical Director in 1964 and also editing Cardiovascular Notes.

In 1973 Allan resigned from Prince Henry's, gave up his medical practice and moved to London to concentrate on his other major interests of writing and involvement in the Human Rights issue, in particular the abuse of psychiatry in the Soviet Union. He was active on the Committees for the release of Vladimir Bukovsky, Pyotr Grigorenko, Alexander Ginzburg and Anatoly Koryagin. In 1983 he became a member of the Board of the Sakharov Institute in the United States and, in 1985, chaired the Executive Committee for the Fifth International Sakharov Hearing. He edited the proceedings of the hearings, published in 1986.

His non-medical publications included The Fortunes of Samuel Wynn, his father who founded the Wynvale wine empire, Notes of a Non-Conspirator, and Conversations, a volume of poetry. Allan always had an intense interest in the Arts and it seemed fitting that he should have married Sally Gilmour, a former principal ballerina with the Ballet Rambert, by whom he is survived, together with two sons and one daughter.