Originally Posted by
Stavros
Strictly speaking and in legal terms I am wrong, but my understanding has been that it would be problematic for a practicing Roman Catholic to be Prime Minister because the head of the Catholic Church is the Pope whereas the Head of State in the UK is the Monarch, who is also Supreme Governor of the Church of England, and the political leader of the UK -by definition a Christian state- is the Monarch's Prime Minister. So problematic that it has never happened, even though Tony Blair went to mass with his family, although that does suggest most people don't care.
It is part of the question of loyalty that dates from the bloody feuds that followed the schism with Rome under Henry VIII, the anti-Catholic laws, that held sway until the Catholic Emancipation Act of 1829, and the general view that -until the Blair era I suspect- Catholics could not be relied upon to put the Monarch ahead of the Pope.
It is also complicated by the 'Irish Question' that played a major role in British politics from the mid-19th century to the Treaty of 1921 and independence, and can be seen at the moment in the difficulty surrounding Theresa May's need to agree a voting arrangement with the Protestants of Northern Ireland which will maintain her slight grip of power while the Catholics protest it is a violation of the Good Friday Agreement and should not go ahead.
'Let's not go there' would be the standard view on this issue, I think.