Physicist. Cambridge Royal Signals and Radar Establishment Malvern, Aerials Group, 1943-1947; A.E.R.E. Malvern, Accelerator Group, 1947-1951; A.E.R.E. Harwell, General Physics Division, 1951-1962; Microwave Lab., Stanford Univ., U.S.A., 1959-1960; Rutherford Laboratory, from 1962.