[Menydh]

Does he offer any type of genetic data divided by regions?

The percentages are usually given as overall England, which include regions like Cornwal, Devon and Sommerset. The old Kingdom of Dumnonia (Dyfneint) seems to have acted as a reduct where Britons were not overrun by Saxons, and only later Saxons from the Kingdom of Wessex would have settled as overlords, with Briton territory reducing to Cornwall.

Clearly if you include those western regions to account for a genetic map of England, the picture has to approach to that of Wales. But, what if you consider regions like Wessex or Essex alone?

What does this tell of England as a whole, as a country? Well, perhaps that it cannot be taken as either a Celtic nor a Germanic country, lying somewhere in the middle or nowhere in there. Which answer should you expect in real life if you told an English that he is a Germanic? Likely, a denial. Or at least a fair degree of reticence to admit it. At least that has been my experience at large. For some reason they appear to be more eager to identify with the Briton identity. Who knows? Perhaps because that gives them more of a native status?