Let's knock this Fid Def nonsense on the head right way. It was a title granted by the Pope - a foreign power - to Henry VIII for writing a book against Martin Luther so defending the Roman Catholic faith. Monarchs have kept it on their lists of titles ever since because it looks good and they love their titles. So the Queen, the head of the Church of England who still hasn't ordained a woman bishop, is the Fid Def of the Roman Catholic church, who think woman are second class anyway. All typical of the nonsense we have to tolerate.
Then their the Order of the British Empire...