I have been wondering the same thing. How do they differentiate between British Isles DNA and Central European DNA, if the British Isles DNA is made up of Central European DNA? (Norman, Anglo-Saxon, etc). Same with Scandinavian. Since British Isles DNA commonly contains Scandinavian DNA, how can they be two different categories on Ancestry? Is Celtic DNA the differentiator? Is that what distinguishes British DNA from Central European?
My family is almost all originally from the British Isles, yet my results say 11 percent British Isles and 55 percent Central European. Is this possibly the Norman and the Anglo-Saxon coming through? And if that's Central European, what qualifies as British?