London is one of the most ethnically diverse cities in the world. In 2007 there were over 300 languages spoken in it and more than 50 non-indigenous communities with a population of more than 10,000 - wikipedia 
Proportion stating they were Muslim in the 2011 census in Greater London.
- wikimedia
At the 2011 census London had a population of 8,173,941. Of this number, only 44.9% were White British. 37% of the population were born outside the UK, including 24.5% born outside of Europe.