Before 1951 Lee worked primarily as a journalist and as a scriptwriter. During the Second World War he made documentary films for the GPO Film Unit (1939–40) and the Crown Film Unit (1941–43). From 1944 to 1946 he worked as the Publications Editor for the Ministry of Information. In 1950 Lee married Catherine Francesca Polge, whose father was Provençal and whose mother was another of the Garman sisters, Helen; they had one daughter, Jessie. From 1950 to 1951 he was caption-writer-in-chief for the Festival of Britain, for which service he was made a Member of the Order of the British Empire in 1952.