And who's to say, if the Spanish Match goes through and Charles converts to Catholicism, that the fervently-Protestant Henry won't just exile his brother as an apostate and/or traitor once their father is dead? It would almost be like Charles II and James II a generation early. The Spanish Match was never popular in England to begin with. Catholicism aside, there were probably still people in England who remember the Spanish Armada, or maybe even as far back as Mary I and her marriage to Philip of Spain.