What is the name of the monarch's official flag which bears, in banner form, the arms used by the Queen in her official capacity and which are authorised from the Lord Chamberlain's Office, a department within the British Royal Household?
Lord Chamberlain's Office: The Lord Chamberlain's Office is a department within the British Royal Household. Lord Chamberlain's Office:  It is also responsible for authorising use of the Royal Arms.
i don't know