Methodology related to amcanestyniadau poblogaeth

User guidance on continuing to use the 2018-based subnational population projections (SNPPs) in the absence of 2020-based SNPPs. Links to information about the uncertainty of the mid-2020 population estimates and an outline of our plans for the integration of Census 2021 data into future SNPPs.

Information on the data, methods and assumption setting process used to produce the 2020-based interim national population projections.

The data sources and methodology used to produce migration assumptions in the 2020-based interim national population projections.

The data sources and methodology used to produce mortality assumptions in the 2020-based interim national population projections.

The data sources and methodology used to produce fertility assumptions in the 2020-based interim national population projections.

Quality and methodology information (QMI) for national population projections, detailing the strengths and limitations of the data, methods used and data uses and users.

The aims of this user guide are to provide guidance and examples for those wishing to understand and use variant projections in policy and planning.

User guidance, uses, assumptions and methodology for the subnational population projections for each constituent country of the UK.

Guidance for users about the coherence and comparability of household projections for England, Wales, Scotland and Northern Ireland.

Quality and Methodology Information (QMI) report for household projections in England, detailing the strengths and limitations of the data, methods used, and data uses and users.