The epic poem Beowulf is probably the best known piece of Anglo-Saxon literature - it's certainly one I was aware of, and had an idea of the shape of the story before we listened to the In Our Time episode about it. However it was unknown until the 19th Century when a single manuscript copy dating from around 1100AD was discovered. The three experts who discussed it on the programme were Laura Ashe (University of Oxford), Clare Lees (King's College London) and Andy Orchard (University of Oxford).
The form of the Arthurian legend that was written by Thomas Malory in Le Morte d'Arthur was the first English language prose form of this legend, written around the 1460s & it had a lot of influence on later stories about Arthur. Discussing it on In Our Time were Helen Cooper (University of Cambridge), Helen Fulton (University of York) and Laura Ashe (University of Oxford).