Complex sentence: He was educated at St Dunstan's College, Catford, where he was head boy and captain of judo, and Magdalen College, Oxford, where he took the top First in Modern History for his year in 1989.
Split into simpler sentences: He was educated at St Dunstan's College, Catford, where he was head boy and captain of judo. He proceeded to Magdalen College, Oxford, where he took the top First in Modern History for his year in 1989.