'Where have London's white British gone?'
20 February 2013 Last updated at 07:44 GMT
White people in London are in the minority.
The last census revealed that only 45% of Londoners describe their ethnicity as white British and in Newham, one of London's borough's, the figure is just 16%.
The BBC's home editor Mark Easton hears from locals that the changes are causing much soul-searching among London's residents.
Mark analysed and mapped the census data and discovered a much more complex and intriguing story than many of the headlines would have us believe.
More on this story and the maps that illustrate the migration are available on Mark's blog.
First broadcast on BBC Radio 4's Today programme on Wednesday 20 February 2013.