Oh yes it can. And it has in the past.And it will again
because of succession laws.Camella is a closet Roman Catholic.
Succession is governed by the Act of Union 1800, which restates the provisions of the Act of Settlement 1701 and the Bill of Rights 1689. These laws restrict the succession to legitimate descendants of Sophia, Electress of Hanover, and debar those who are Roman Catholics or who have married Roman Catholics
(Camilla Parker Bowles is supposed to be Anglican and not Catholic. She is however regarded as a Catholic because she married her first husband in a Catholic Church.)
Charles is easily disposable, the way to do it is readily available should the need arise.
Even if she was (and I don't believe she is), this is no longer relevant.
Succession is governed by the Act of Union 1800, which restates the provisions of the Act of Settlement 1701 and the Bill of Rights 1689. These laws restrict the succession to legitimate descendants of Sophia, Electress of Hanover, and debar those who are Roman Catholics or who have married Roman Catholics.
You're missing a law - that's OK, it's a new one.
The Succession to the Crown Act 2013
It hasn't taken affect yet, but it has passed the United Kingdom Parliament and been agreed to in principle by the Parliaments of the other Commonwealth Realms (who, under the Statute of Westminster, must be involved in decisions to change the law governing succession). The most publicised provision of this new law (and the main reason it occurred) is that it changes the principle of male-preference primogeniture, where a male took precedence over a female sibling - it was passed so the first child of the Duke and Duchess of Cambridge would become Heir whether male or female. But one of the other provisions removes the disqualification for those who marry Catholics - a person is still disqualified from the line of succession if they become a Catholic themselves, but not by marrying a Catholic. And the law does restore anybody who was previously disqualified by marriage to a Catholic to their place in the line (the first person for whom this is relevant is George Windsor, Earl of St Andrews, who was disqualified in 1988 by his marriage to Sylvana Tomaselli, but will now be 33rd in line to the throne).
(Camilla Parker Bowles is supposed to be Anglican and not Catholic. She is however regarded as a Catholic because she married her first husband in a Catholic Church.)
No, she didn't. She married Andrew Parker Bowles at the Guards Chapel, Wellington Barracks - also known as the Royal Military Chapel. It's certainly not a Catholic Church.
It may have been a Catholic ceremony (I don't know for certain - but while regular Sunday services at the RMC are Church of England, they do allow its use by other Christian faiths for baptisms, weddings, and funerals) but being married in a Catholic Church to a Catholic does not make somebody a Catholic themselves.
Charles is easily disposable, the way to do it is readily available should the need arise.
Parliament could always alter the line of succession - that's in their purview. But without a very good reason, there'd be widespread outrage.