Riots At G20 Summit, London, United Kingdom

The region covers an area of 1,579 square kilometres (610 sq mi). The population density is 4,542 inhabitants per square kilometre (11,760 /sq mi), more than ten times that of any other British region. In terms of population, London is the 25th largest city and the 18th largest metropolitan region in the world. It is also ranked 4th in the world in number of billionaires (United States Dollars) residing in the city. London ranks as one of the most expensive cities in the world, alongside Tokyo and Moscow.
Ethnic groups
According to the Office for National Statistics, based on 2007 estimates, 69.0 per cent of the 7.5 million inhabitants of London were White, with 57.7 per cent White British, 2.4 per cent White Irish and 8.9 per cent classified as Other White. Some 13.3 per cent are of South Asian descent, with Indians making up 6.6 per cent of London's population, followed by Pakistanis and Bangladeshis at 2.4 per cent and 2.3 per cent respectively. 2.0 per cent are categorised as "Other Asian". 10.6 per cent of London's population are Black, with around 5.5 per cent being Black African, 4.3 per cent as Black Caribbean and 0.8 per cent as "Other Black". 3.5 per cent of Londoners are of mixed race; 1.5 per cent are Chinese; and 2.0 per cent belong to another ethnic group. The non-white ethnic minority population of London in 2001 was just over 2 million or 29 per cent: an increase of 722,000 from 1991.