I've never actually seen a thread on this before, nor do I remember seeing such an idea mentioned. As we all know the British Act of Settlement banned Catholics and those married to Catholics from the throne. However it never mentioned former Catholics. So, assuming one can get a Catholic Princess to convert, would she be an acceptable Royal bride or would Parliament promptly freakout? Would it depend on just which Royal House is being considered, like an Infanta of Portugal or Princess of Saxony over an Archduchess of Austria or Princesse of France? Assuming no last minute attempt to ban such a marriage, how would the public react? Happy that it's not another German (depending on the bride), anger at a Papist sleeper agent or just indifference?