The Flag of the City of London is based on the Flag of England, having a centred red St George's Cross on a white background, with the red sword in the upper hoist canton (the top left quarter) containing a red sword. The sword is believed to represent the sword that beheaded Saint Paul who is the patron saint of the city. The sword always faces upwards, when the flag is held on its side as a banner, the sword would be printed to face hoist and would be located on the left as it is hanging down.
This flag does not represent Greater London (which does not have its own flag, aside from the flag of the former Greater London Council), only the historical centre of the City of London which covers approximately 1 square mile (2.6 km2). All references in this article relate to that city, not Greater London, unless specified.