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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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Quality and Methodology Information for crime levels and trends in England and Wales, detailing the strengths and limitations of the data, methods used, and data uses and users.
What the Household total wealth in Great Britain statistics cover, how we produce them, and their quality and comparability. Includes definitions and latest, past and upcoming changes.
The quality of the linkage of Census 2021 to the Office for National Statistics Longitudinal Study, including tracing rates, sampling fractions, and forwards and backwards linkage rates.
Quality and methodology information for conception statistics produced for England and Wales, detailing the strengths and limitations of these data, methods used and data uses and users.
Wealth and Assets Survey design and implementation, including collection methods, sample design, response rates, coverage and processing. Also includes survey changes and quality information.
What our fertility statistics cover, how we produce them, and their quality and comparability. Includes definitions and past, latest, and upcoming changes.
Links to guidance, methodology and information documents for crime statistics in England and Wales.
Quality and Methodology Information for births occurring and registered in England and Wales. Data strengths and limitations, methods, and data uses and users.
Methodology used to produce our provisional long-term international migration estimates.
An explanation of the methods used to produce the latest provisional statistics on migration flows into and out of the UK.
