Even if British law did or does not make him a British citizen at birth, the fact that both his parents were not US citizens would disqualify him.
Under the 14th amendment he would be a citizen, same as Wong Kim Ark, but not a natural born on. The 14th amendment does not contain the words "Natural born citizen" or even "natural born". Thus it did not redefine the term as originally understood. Which of course was "born in the country of parents who are it's citizens".
Right. We know the architects of the 14th Amendment knew exactly what the framers meant when they put the NBC requirement into the Constitution:
Vattel's definition for "natural born citizen" was read into the Congressional Record after the Civil War.
John Bingham, "father" of the 14th Amendment, the abolitionist congressman from Ohio who prosecuted Lincoln's assassins, REAFFIRMED the definition known to the framers by saying this:
commenting on Section 1992 said it means “every human being born within the jurisdiction of the United States of parents not owing allegiance to any foreign sovereignty is, in the language of your Constitution itself, a natural born citizen.” (Cong. Globe, 39th, 1st Sess., 1291 (1866))"