Complex sentence: Chris Smith was born in Barnet, London, and educated at George Watson's College in Edinburgh and Pembroke College, Cambridge, where he gained a first class honours degree in English and a PhD with a thesis on Coleridge and Wordsworth.
Split into simpler sentences: Chris Smith was born in Barnet, London, and educated at George Watson's College in Edinburgh and Pembroke College, Cambridge. At the latter he gained a first class honours degree in English, and a PhD with a thesis on Coleridge and Wordsworth.