The United Kingdom's national and royal anthem, "God Save the Queen", has been in use since 1745. It is known as either "God Save the Queen" or "God Save the King," depending on the gender of the reigning monarch. It also serves as the royal anthem of many Commonwealth nations -- countries that were once part of the British Empire.
Shown is the flag of United Kingdom: a blue field with the red cross of Saint George, the patron saint of England, edged in white and superimposed on the diagonal red cross of Saint Patrick, patron saint of Ireland, which is superimposed on the diagonal white cross of Saint Andrew, the patron saint of Scotland. Properly known as the Union Flag, but commonly called the Union Jack, the design and colors (especially the Blue Ensign) have been the basis for a number of other flags.