Question: 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?
Sentence (from "Lord Chamberlain's Office"): It is concerned with matters such as protocol, state visits, investitures, garden parties, the State Opening of Parliament, royal weddings and funerals.
Relevant evidence: No