Who Wrote the First Folk Song?

Who wrote the first folk song? It's an age old question, these tunes that everyone knows which have been passed down from generation to generation... Where do they come from? Enlisting the help of ethnomusicologist and folk singer Dr Fay Hield and folklore expert Steve Roud, Tom Service embarks on a quest to the very origins of music. It's a journey that takes him back in time from modern-day folk clubs to the origins of the species (via rural Lincolnshire in the early 20th century).