Interesting, and kind of illustrating why the original question is a bit nonsense, neither the OP nor anyone else has attempted to define its terms of reference.
What is ancestrally English? Is it “from England”? In which case do you mean the England of the 15th century that included Calais and Monmouthshire, the England of the 16th century that included Wales (or if you prefer, the rest of Wales), but not Calais, or the England we now use for sporting purposes that includes none of the above? If you mean of exclusively Anglo-Saxon ancestry then there probably weren’t any of them even in the 10th century. Certainly not in the north what with all the Danes being about and their men being rather horny.
The question is a nonsense. The DNA tests that inspired it can be a bit of fun but are scientific gibberish. And in the end, we are all African apes anyway.