Ed, St. Mary's College, St. Lucia. Bachelor of Laws with honours, University London, 1941. Doctor of Laws (honorary), University West Indies, 1974.
He was one of the founders and the first president of the Saint Lucia Labour Party in 1950. Before his appointments to the viceregal post, Sir Allen sat on the legislative council (1943–1951) and was a senator in the West Indian Federal Parliament (1958–1959). In 1975 he became Chancellor of the University of the West Indies.
In 1972 he returned to Saint Lucia and spent two years establishing a National Development Corporation to develop the economy of the island, after which he was appointed Governor of Saint Lucia, the Queen's representative and Head of State.
When Street Lucia gained independence in 1979 he served twice in the equivalent role as Governor-General of Saint Lucia (1979–1980 and 1982–1987). Honours and 1952 Awarded the Coronation Meda
Active numerous government & public committees on education & government. Patron St. Lucia Association Retarded Children, since 1975, British Commonwealth Ex-Services League, St. Lucia, 1975—1980, 1983—1987. President West Indies Senate, 1958—1959.
Island Church council. member, 1935—1959. Warden Holy Trinity Church, 1939—1959, member parochial council, 1955—1959. Secretary Island Church.
Teacher, supervisor Sunday school. Manager Island Church Schools. Member legislation counc.
Castries Town Council, 1942—1956, St. Lucia, 1943—1951. Board directors St. Lucia branch British Red. Cross Society, 1959; Member of Yacht Club (St. Lucia).
Married Edna Leofrida Theobalds, 1936. 5 children.