@Foofie,
The House of Saxe-Coburg-Gotha was known for it's 'marriage politics': they are not only 'present' in England, but in the royal houses of Belgium, Portugal, Bulgaria, Sweden as well - some very strong Catholic dynasties , not all Anglicans, I think ...
Empress Eadgyth's bones "are the oldest surviving remains of an English royal burial" it as said. But she was the wife of Otto I, Holy Roman Emperor...