Tolkien through the years

To mark the global publication of the latest posthumous JRR Tolkien release, Beren and Luthien, Oxford University's Bodleian Library opened its doors to the BBC. The manuscripts of the Middle Earth creator, and Oxford don, are held at the library - some of which were written in the trenches during WW1 - with many never before seen in public. The Tolkien Archivist Catherine McIlwaine takes us through some of the collection.