Greater London is the epicentre of the country. For this reason, people from all over the world make their way here to make a new life for themselves. This has led to an extremely diverse demographic profile. There are high proportions of people from Bangladesh, India, the Republic of Ireland, Jamaica, South Africa and Nigeria. As testimony to London’s desirability as a home city, it has a density of about 5000 people per square kilometer, which far exceeds that of any other region in the country (and many urban areas of the world). Although London City is one of the most expensive cities in the world, it remains one of the most popular in which to live and work.