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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.
Methodology used to produce our provisional long-term international migration estimates.
Quality and Methodology Information for long-term international migration statistics, detailing the strengths and limitations of the data, methods used, and data uses and users.
An explanation of the methods used to produce the latest provisional statistics on migration flows into and out of the UK.
Quality and methodology information for national population estimates broken down into small geographical areas (Super Output Areas, health geographies, electoral wards, Parliamentary constituencies and National Parks) in England and Wales. Details the strengths and limitations of the data, methods used, and data uses and users.
Information on the methods used to produce the 2022-based household projections for England.
Quality and Methodology Information report for household projections for England.
What the population estimates by marital status and living arrangements cover, how we produce them, and their quality and comparability. Includes definitions and latest, past and upcoming changes.
Method for predicting the stability of non-EU+ long-term international migration (LTIM) estimates, with supporting revision analysis, to provide a probabilistic revision range for the current estimates.
Quality and methodology information for mid-year population estimates in the UK, detailing the strengths and limitations of the data, methods used, and data uses and users.
How we produced the statistics, their strengths and limitations and further quality information.
