"So, after all these years, Charles III isn't King of England, Ireland, Scotland, and Wales. He couldn't be, thanks to The Norman Settlement. Like his ancestors, he is limited to working as the Pope's Overseer of the Commonwealth, so not only is he not a King, he's a Protestant obligated to serve the Pope, plus, he's a German who has just been crowned as a Roman Emperor.
We couldn't possibly make this up." — http://annavonreitz.com/crownofferrejected.pdf [PDF]
Probably same blood lines...