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
East London Tech City East London Tech City East London Tech City (also known as Tech City and Silicon Roundabout) is the term for a technology cluster of high-tech companies located in Shoreditch/St Luke's and also in Hackney Wick in London, England. Its nucleus broadly occupies an area between St Luke's and Hackney Road. A cluster of web businesses initially developed around the Old Street Roundabout in 2008. The area had historically been relatively run down compared to the City. The 2008–09 recession further suppressed rents through the closure of numerous firms, making it affordable to technology start-ups, while redundancies from financial services companies,