United Kingdom Royal Standard flag
The Royal Standard of the United Kingdom is the flag used by Elizabeth II in her capacity as Sovereign of the United Kingdom and its overseas territories. Different standards are used in the Queen's other Commonwealth realms, and the Royal Standard of the United Kingdom is varied for use in Scotland.
The Royal Standard of the United Kingdom is flown when the Queen is in residence in one of the royal residences, on the Queen's car on official journeys and on aircraft (when on the ground). It may also be flown on any building, official or private, during a visit by the Queen, if the owner or proprietor so requests. The Royal Standard was also flown aboard the royal yacht when it was in service and the Queen was on board. The only church that may fly a Royal Standard, even without the presence of the Sovereign, is Westminster Abbey, which is a Royal Peculiar. Other churches generally are not allowed to hoist a Royal Standard.