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We moved them to The National Archives website, to keep this website as responsive as possible.
Please note: all historical data is still on this website.
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Dewis pwnc arall neu clirio pob hidlydd.
The methods the Office for National Statistics (ONS) will use to assess the benefits of Census 2021 data for users, including central and local government, private and voluntary sectors.
Quality information affecting ethnic group, national identity, language and religion data from Census 2021 in England and Wales to help users correctly interpret them.
Technical appendix to accompany Estimates of coronavirus (COVID-19) related deaths by hearing and vision impairment status in England for deaths occurring up to 20 July 2022.
Quality information about the UK armed forces veterans data from Census 2021 in England and Wales to help users correctly interpret them.
The model selection process and chosen models for coverage estimation of Census 2021 in England and Wales.
Methodology for coverage estimation of Census 2021 in England and Wales.
The Health Index for England, which measures the health of the nation; definitions of the indicators used.
The methods for resolving item non-response and item inconsistencies in Census 2021 data, including deterministic editing, nearest neighbour donor imputation, and manual imputation.
Methodology for the validation of Census 2021 population estimates for England and Wales, including the assurance of processes, assessment of estimates, and involvement of local authorities.
Methodology for the validation of the Census 2021 population estimates for each local authority, as part of the wider quality assurance of the census data.
