This dataset provides 2011 estimates that classify usual residents in England and Wales by their year of arrival in the UK. The estimates are as at census day, 27 March 2011.

This is the first time this information has been available from the census. It helps to provide accurate migration trends to the United Kingdom (UK) and allows increased understanding of the proportion of migrants that remain in the UK. It also helps to determine the number of short-term migrants, which allows national and local government to better understand the size of the population so they can plan, fund and provide appropriate 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.