You asked

Last month (November 2014) the ONS published statistics showing that in 2013, 197,000 internal migrants moved to London, while 252,000 moved out.

Could you please supply me with all details that you hold relating to the ethnicity of the migrants moving into London and those moving out.

We said

You have requested information under the Freedom of Information Act about internal migration in and out of London.

The data used to produce the published annual internal migration estimates that you refer to do not include any information on ethnicity and so it is not possible to provide the information you have requested.

However, ONS is planning to publish statistics from the 2011 Census which will show internal migration in and out of London in the year leading up to Census day 27 March 2011. These statistics are planned for release in January 2015 and I will arrange for an alert to be sent to you at the time of publication.