I do not wish to drag on about this but I want to say that I have read Francis Pryor. Here is a brief, very brief observation of some of his thoughts. He makes the assumption that until he came along all historians regarded post Roman Britain as being in the throes of a barbaric "Dark Age". I know of no historian who ever thought that. The idea that Pryor dispelled this "myth" is dodgy at best and at worst it is , historically speaking , a bit intellectually lazy.