London is a major financial centre for international business and commerce and is one of the command centres for the global economy. London's success as a service industry and business centre can be attributed to the aggregate effect of several factors. Many professional services firms are located in London including international lawfirms, accountants, actuaries and management consulting firms.The City is the world’s leading centre for international financial services and business.
A useful guide to the distribution of wealth across London is the cost of renting office space.Mayfair and St James are historically and currently the most expensive areas, approximately £80.00 per sq ft per annum. The least expensive commercial districts are Waterloo, Southwark and East London approximately £33.00 per sq ft per annum.
London has five major business districts: the City, Westminster, Canary Wharf, Camden & Islington and Lambeth & Southwark. One way to get an idea of their relative importance is to look at relative amounts of office space: Greater London had 27 million of office space in 2001, and the City contains the most space, with 8 millionof office space. London has some of the highest real estate prices in the world.
Tourism is one of London's prime industries, and London is, by a considerable margin, the most visited city in the world by international tourists in. London has a diverse range of peoples and cultures, and more than 300 languages are spoken within its boundaries. London's buildings are too diverse to be characterised by any particular architectural style, partly because of their varying ages.