City of London London borough, a status reserved for the other 32 districts (including London's only other city, the City of Westminster). It is also a separate county of England, being an enclave surrounded by Greater London. It is the smallest county in the United Kingdom. The City of London is widely referred to simply as the City (differentiated from the phrase "the city of London" by capitalising "City") and is also colloquially known as the Square Mile, as it is in area. Both of these terms are also often used as metonyms for the United Kingdom's trading and financial services industries, which
Flag of the City of London it is hanging down (see below). This flag does not represent Greater London (which does not have its own flag, aside from the banner of the arms of the former Greater London Council), only the historical City of London which covers approximately . All references in this article relate to that city, not Greater London, unless specified. The flag is a banner of arms, derived from the city's coat of arms with the sword symbolising the sword that beheaded Saint Paul who is the patron saint of the city. Saint Paul has featured as a symbol of the city since