Havers was called to the Bar at Inner Temple in 1920, coming top of the bar examinations, and "took silk" to become a King's Counsel in 1939. He served as recorder of Chichester from 1939 to 1951. He also served as a judge in the Gold Coast in 1944-45, and as a Commissioner of Assize in the midlands in 1949. He became a bencher at Inner Temple in 1946, and served as Treasurer in 1971. He was elected as an honorary fellow of Corpus Christi in 1975.