Greater London is often referred to as "the City" or "the Square Mile" and it forms the main financial district. Archaically, the urbanised area of London was known as the Metropolis. In common usage, the terms "London" and "Greater London" are usually used interchangeably. Greater London is officially divided for some purposes, with varying definitions, into Inner London and Outer London. For some strategic planning purposes it is divided into five sub-regions. Greater London is under the strategic local governance of the Greater London Authority (GLA). It consists of an elected assembly, the London Assembly, and an executive head, the Mayor of
Central London Central London Central London (also known less commonly as London city centre) is the innermost part of London, in the United Kingdom, spanning several boroughs. Over time, a number of definitions have been used to define the scope of central London for statistics, urban planning and local government. Its characteristics are understood to include a high density built environment, high land values, an elevated daytime population and a concentration of regionally, nationally and internationally significant organisations and facilities. Road distances to London are traditionally measured from a central point at Charing Cross (in the City of Westminster), which is marked