Interview focusses on early life in Vienna, family and religion; atmosphere in Vienna in early 1930s; growth of interest in mathematical physics; anti-Semitism in Vienna; influence of history teacher and rejection of religion; influence of reading Eddington and Jeans in the mid-1930s; further study in England and contact with Eddington; Trinity College, 1937-1940; study with Besicovitch; collapse of plebiscite and family in Vienna; internment during World WarII; graduate study with Harold Jeffreys; naval radar, 1942; associates during war and circle at Cambridge; development of radar resear