How might one devise a scenario where most of Britain between the Firth of Forth and the Humber remain deminated by britons, speaking a language akin to Welsh, into the modern day. Do we have to find a way to strangle Northumbria in the cradle? Could it be an even later POD? Could this Briton-dominated central Britain unify, or would it remain disunited? Might we see four distinct regions emerge in the British Isles, one Anglo-Saxon, one Brythonic, one Gaelic, and one Pictish?