English law has never followed jus sanguinis.
We haven't been subject to English Law since July 4, 1776, or didn't you get the memo.
As far as the rest of your convoluted scenario -- that's nice.
You are completely wrong in your definition of "natural born" citizen. Please educate yourself:
Natural Born Citizen -- The Law
We haven't been subject to English Law since July 4, 1776, or didn't you get the memo. Actually, we have. It's called "the common law", it never went away, and U.S. judges still cite the ancient precedents where not overwritten by U.S. statutes. U.S. law courses still lecture on Mort d'Ancestor and Novel Disseizin.
Have a nice day.