This dataset provides 2011 estimates that classify households in United Kingdom living by the relationships between household members (the household composition). The estimates are as at census day, 27 March 2011.

Estimates that provide insight into household and family relationships aid in the analysis of social structure and help to monitor the changes in the composition and types of households. They are used to inform planning for the services needed to support different types of households and families, for example lone parents, a high concentration of children, or large families. This allows local authorities to assess levels of overcrowding or to identify areas with the potential for higher than average birth rates and an increased demand for health and other services.

In Northern Ireland this table is numbered QS111NI.

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.