To Annoy Parliament
They were styled Catholic monarchs, his wife was not called a Catholic King: The title of "Catholic King and Queen" was bestowed on them by Pope Alexander VI in 1496, for defending Catholic dogmas within their realms.
Queen Isabella I (Isabella the Catholic) got married to King Ferdinand V in 1469.
No catholic queen can sit on the royal throne, the king will have to vacate the throne. We saw King Edward do it after he married Mrs Simpson.
As King or Queen of Britain and therefore the royal Monarch of the Anglican Church of England then I would hazard a guess that a Catholic would not meet the requirements.
protestant
Christopher Columbus sailed under Ferdinand II also know as Ferdinand the Catholic and Isabella II also know as Isabella the Catholic, these were the king and queen of Aragon, Leon, and Castille in Spain.
To be King (or, if a woman, Queen), you have to be next in line to the throne. You also cannot be Catholic, ever have been Catholic, or be married to anyone Catholic (this dates back to shortly after Henry VIII and the split between the catholic church and the Church of England). To be Prime Minister, you must be the choice of the majority party of Parliment and be approved by the King (or Queen), although this approval is a "rubber stamp."
No one. Queen Elizabeth was the daughter of King Henry VIII. King Henry couldn't have a son, so he broke away from the Roman Catholic church to form his own church, that allowed divorces. The Church of England was what Elizabeth was born into.
The dying Queen Isabella the Catholic was able to extract two promises from her husband King Ferdinand. The first was that he would treat Native Americans as if they were Spaniards and the second was that her children would inherit the throne, not his.
Queen Mary was a catholic because her dad was
King Ferdinand and Queen Isabella sponsored Columbus because Columbus told them that if they gave him the money to find another trade route to India he would spread Catholicism in India (king and queen of Spain were Catholic)