 Davies was educated at Mountain Ash Grammar School, King's College London where he received a first-class LLB and an LLB in 1926 and an LLD in 1928.Following this, he completed the BCL in 1929 at Exeter College, Oxford, where he received the Vinerian Scholarship.Called to the Bar at Gray's Inn in 1929, he worked as examiner and lecturer at the London School of Economics in 1930 and 1931.