A new book, and some new knowledge! In this case, why a monarch will use ‘we’ instead of ‘I’ when referring to themselves.

Since mediaeval times, the King had been seen as two bodies in one: a mortal entity and “the King’s person,” representing unending royal authority; monarchs therefore referred to themselves in the plural form as “we.”

Alison Weir, Henry VIII: The King and His Court, 2001