John Boy said:I don't think a Catholic can be on the throne. Something to do with Cromwell and Houses of Parliament
It was Andrew Parker-Bowles who is the Catholic not Camilla (having looked it up)
But the constitution is still the same as when the Duke of Windsor married a divorcee - Wallis Simpson. He had to abidicate.
So who changed it? and when?
If Charles abdicated to marry Camilla, he would have to abdicate for his line so that means the throne would pass to Andrew and then to Beatrice.