After losing his post under the antisemitic laws passed in 1933, Fraenkel emigrated to Great Britain. In 1934 he was elected to a Bevan fellowship at Trinity College, Cambridge, but later in the year took up the Corpus Chair of Latin at Corpus Christi College, Oxford, a post he held until 1953. He was known to be an impressive and exhilarating, if formidable, teacher of both Latin and Greek literature. His wartime seminars on Aeschylus's "Agamemnon" were famous both in their own right and also for forming the basis of his edition of the play, published in 1950, which remains a monument of 20th-century classical scholarship. After 1953 he continued teaching as an honorary fellow. He received the freedom of the city of Sarsina, the birthplace of the playwright Plautus, to whose study Fraenkel made groundbreaking and lasting contributions.