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 "Royal coat of arms of the United Kingdom"): The royal coat of arms of the United Kingdom, or the Royal Arms for short, is the official coat of arms of the British monarch, currently Queen Elizabeth II.
Relevant evidence: Yes