What was the methodology used in the 2011 census?

The methodology used in the 2011 UK Census involved a combination of various strategies designed to ensure that data collection was efficient, comprehensive, and reliable. The census process was carried out by the Office for National Statistics, with similar processes implemented by the respective national statistical agencies in Scotland and Northern Ireland. The primary aim was to collect information on the population living in the UK on a specific night. Firstly, the census utilized a self-completion questionnaire, which was sent to every household across England and Wales. This questionnaire asked a range of questions about individuals’ demographic information, such as age, gender, and ethnic background, as well as household composition, housing conditions, and economic activity. The questionnaire was available in several languages and formats, ensuring accessibility to diverse populations. In addition to the questionnaire, the methodology included a comprehensive field operation for those who did not respond by the initial deadline. Trained census enumerators visited households to assist with completion or to collect responses directly. This face-to-face engagement helped to boost response rates and ensure accurate data collection. Moreover, the census employed rigorous quality assurance procedures, including pre-census testing of the questionnaire and follow-up surveys to verify the accuracy of the data collected. The statistical agencies also used administrative data and register data to supplement the information gathered through the census forms. This combination of methodologies contributed to producing robust population estimates and a wealth of information that is crucial for planning and research purposes. For more details or insights into specific elements of the methodology, one might consider looking at the publications available on the current website dedicated to the UK Census 2011.