This dataset provides 2011 estimates that classify usual residents in England and Wales by their use of a second address, and whether that second address is inside or outside the UK. The estimates are as at census day, 27 March 2011.

A second address is an address at which a person stays for more than 30 days per year that is not their place of usual residence.

This is the first time estimates of second homes have been provided from the census and, not only will it provide better understanding of the fluidity of the population, it will allow local authorities to plan and make policy decisions for the provision of services.

In order to protect against disclosure of personal information from the 2011 Census, there has been swapping of records in the Census database between different geographic areas, and so some counts will be affected. In the main, the greatest effects will be at the lowest geographies, since the record swapping is targeted towards those households with unusual characteristics in small areas.

More details on the ONS Census disclosure control strategy may be found on the http://www.ons.gov.uk/ons/guide-method/census/2011/census-data/2011-census-prospectus/new-developments-for-2011-census-results/statistical-disclosure-control/index.html[Statistical Disclosure Control] page on the ONS web site.