I've just found this has been added to the details on the festival site
"Matthew Wadsworth drew us into his intimate world of music written for the lute and theorbo last year when he played for us in the Abbey. But he also spoke so well about his music, we thought how wonderful if we could entice him to do our lecture recital – and he said Yes! Master of the Lute, the Miller’s Tale was written specifically for Matt by Stephen Goss, as well as a concerto for theorbo. The title of his lecture will therefore be The Theorbo, a giant Lute with a big past, present and future."