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?

full_context: Document 1: British royal family: The British royal family comprises the monarch of the United Kingdom and her close relations. There is no strict legal or formal definition of who is or is not a member of the British royal family, and apart from Queen Elizabeth II herself, different lists will include different people. Those who, at a time in question, carry the style His or Her Royal Highness (HRH), and any styled His or Her Majesty (HM), are normally considered members, including those so styled before the beginning of the current monarch's reign. By this criterion, a list of the current royal family will usually include the monarch, the consort of the monarch, the widows of previous monarchs, the children and male-line grandchildren of the monarch and previous monarchs, the children of the eldest son of the Prince of Wales, and the wives or widows of the monarch's and previous monarchs' sons and male-line grandsons.
Document 2: 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. These arms are used by the Queen in her official capacity as monarch of the United Kingdom. Variants of the Royal Arms are used by other members of the British royal family; and by the British government in connection with the administration and government of the country. In Scotland, there exists a separate version of the Royal Arms, a variant of which is used by the Scotland Office. The arms in banner form serve as basis for the monarch's official flag, known as the "Royal Standard".
Document 3: Coat of arms of the Netherlands: The coat of arms of the Kingdom of the Netherlands was originally adopted in 1815 and later modified in 1907. The arms are a composite of the arms of the former Dutch Republic and the arms of the House of Nassau, it features a checkered shield with a lion grasping a sword in one hand and a bundle of arrows in the other and is the heraldic symbol of the monarch (currently King Willem-Alexander) and the country. The monarch uses a version of the arms with a mantle (Dutch: "Koninklijk wapen" ) while the government of the Netherlands uses a smaller version without the mantle (cloak) or the pavilion, sometimes even only the shield and crown are used (Dutch: "Rijkswapen" ). The current components of the coats of arms were regulated by Queen Wilhelmina in a royal decree of 10 July 1907, affirmed by Queen Juliana in a royal decree of 23 April 1980.
Document 4: Vice-Chamberlain of the Household: The Vice-Chamberlain of the Household is a member of the Royal Household of the Sovereign of the United Kingdom. The office-holder is usually a junior government whip in the British House of Commons ranking third or fourth after the Chief Whip and the Deputy Chief Whip. He or she is the Deputy to the Lord Chamberlain of the Household. The Vice-Chamberlain's main roles are to compile a daily private report to the Sovereign on proceedings in the House of Commons and to relay addresses from the Commons to the Sovereign and back. As a member of the Royal Household, the Vice-Chamberlain accompanies the Sovereign and Royal Household at certain diplomatic and social events, particularly the annual garden party at Buckingham Palace. When the Sovereign goes in procession to Westminster for the State Opening of Parliament, the Vice-Chamberlain stays and is "held captive" at Buckingham Palace. This custom began with the Restoration (1660), because of the previous Vice-Chamberlain's role in the beheading of Charles I.
Document 5: Commander-in-chief of the British Armed Forces: The Commander-in-Chief of the British Armed Forces is a position vested in the British monarch, currently Queen Elizabeth II, who as Sovereign and head of state is the "Head of the Armed Forces". Long-standing constitutional convention, however, has vested "de facto" executive authority, by the exercise of Royal Prerogative powers, in the Prime Minister and the Secretary of State for Defence, and the Prime Minister (acting with the support of the Cabinet) makes the key decisions on the "use" of the armed forces. The Queen, however, remains the "ultimate authority" of the military, with officers and personnel swearing allegiance only to the monarch.
Document 6: Monarchy of the United Kingdom: The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the constitutional monarchy of the United Kingdom, its dependencies and its overseas territories. The current monarch and head of state, Queen Elizabeth II, ascended the throne on the death of her father, King George VI, on 6 February 1952.
Document 7: Royal Arms of Scotland: The royal arms of Scotland was the official coat of arms of the King of Scots first adopted in the 12th century. With the Union of the Crowns in 1603, James VI inherited the thrones of England and Ireland and thus his arms in Scotland were now quartered with the arms of England (which was itself quartered with France) with an additional quarter for Ireland also added (the arms would continue to alter in later years). Though the kingdoms of England and Scotland would share the same monarch, the distinction in heraldry used in both kingdoms was maintained. When the kingdoms of Scotland and England were united under the Acts of Union 1707 to form the United Kingdom of Great Britain, no single arms were created and instead, the royal arms as used in either Scotland and the rest of the United Kingdom would continue to differ.
Document 8: Lords Commissioners: The Lords Commissioners are Privy Counsellors appointed by the Monarch of the United Kingdom to exercise, on his or her behalf, certain functions relating to Parliament which would otherwise require the monarch's attendance at the Palace of Westminster. These include the opening and prorogation of Parliament, the confirmation of a newly elected Speaker of the House of Commons and the granting of Royal Assent. The Lords Commissioners are collectively known as the Royal Commission. The Royal Commission includes at least three—and usually five—Lords Commissioners. In current practice, the Lords Commissioners usually include the Lord Chancellor, the Archbishop of Canterbury (who is named but usually does not participate), the leaders of the three major parties in the House of Lords, the convenor of the House of Lords Crossbenchers and (since 2007) the Lord Speaker of the House of Lords.
Document 9: Surveyor of the Queen's Pictures: The office of the Surveyor of the King's/Queen's Pictures, in the Royal Collection Department of the Royal Household of the Sovereign of the United Kingdom, is responsible for the care and maintenance of the royal collection of pictures owned by the Sovereign in an official capacity – as distinct from those owned privately and displayed at Sandringham House and Balmoral Castle and elsewhere. The office has only been full-time since 1972. It now operates in a professional capacity with a staff of a dozen people.
Document 10: Lord Chamberlain's Office: The Lord Chamberlain's Office is a department within the British Royal Household. It is concerned with matters such as protocol, state visits, investitures, garden parties, the State Opening of Parliament, royal weddings and funerals. For example, in April 2005 it organised the wedding of Charles, Prince of Wales and Camilla Parker Bowles. It is also responsible for authorising use of the Royal Arms.
Document 11: President of the Queen's Privy Council for Canada: In the Canadian cabinet, the President of The Queen's Privy Council for Canada (French: "President du Conseil privé de la Reine pour le Canada" ) is nominally in charge of the Privy Council Office. The President of the Privy Council also has the largely ceremonial duty of presiding over meetings of the Queen's Privy Council for Canada, a body which only convenes in full for affairs of state such as the accession of a new Sovereign or the marriage of the Prince of Wales or heir presumptive to the Throne (see Monarchy in Canada). Accordingly, the last time the President of the Privy Council had to preside over a meeting of the Privy Council was in 1981 on the occasion of Charles, Prince of Wales' engagement to Lady Diana Spencer. It is the equivalent of the office of Lord President of the Council in the United Kingdom.
Document 12: Royal Banner of Scotland: The Royal Banner of the Royal Arms of Scotland, also known as the Royal Banner of Scotland, or more commonly the Lion Rampant of Scotland, and historically as the Royal Standard of Scotland, (Scottish Gaelic: "Bratach rìoghail na h-Alba" , Scots: "Ryal banner o Scotland" ) or Banner of the King of Scots, is the Royal Banner of Scotland, and historically, the Royal Standard of the Kingdom of Scotland. Used historically by the King of Scots, the banner differs from Scotland's national flag, the Saltire, in that its correct use is restricted by an Act of the Parliament of Scotland to only a few Great Officers of State who officially represent the Sovereign in Scotland. It is also used in an official capacity at royal residences in Scotland when the Sovereign is not present.
Document 13: Master of the Revels: The Master of the Revels was the holder of a position within the English, and later the British, royal household, heading the "Revels Office" or "Office of the Revels". Originally he was responsible for overseeing royal festivities, known as "revels", and he later also became responsible for stage censorship, until this function was transferred to the Lord Chamberlain in 1624. However, Henry Herbert, the deputy Master of the Revels and later the Master, continued to perform the function on behalf of the Lord Chamberlain until the English Civil War in 1642, when stage plays were prohibited. The office continued almost until the end of the 18th century, although with rather reduced status.
Document 14: Lord Chamberlain: The Lord Chamberlain or Lord Chamberlain of the Household is the senior officer of the Royal Household of the United Kingdom, supervising the departments which support and provide advice to the Sovereign of the United Kingdom.
Document 15: Monarchy of the United Kingdom: The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the constitutional monarchy of the United Kingdom, its dependencies and its overseas territories. The current monarch and head of state, Queen Elizabeth II, ascended the throne on the death of her father, King George VI, on 6 February 1952.
ground_truth: Royal Standard