Complex sentence: Upward was educated at Repton School, where he became a friend of Christopher Isherwood, and from 1922 to 1925, Corpus Christi College, Cambridge, he won the Chancellor's Medal for English Verse in 1924.
Split into simpler sentences: Upward was educated at Repton School, where he became a friend of Christopher Isherwood. As an undergraduate at Corpus Christi College, Cambridge, he won the Chancellor's Medal for English Verse in 1924.