Comparison of available population estimates

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Greater London Authority
Last updated:
09 December 2025
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Summary

At the April 2023 meeting of the Population Statistics User Group, the GLA Demography team presented an overview of currently available sources of population estimates for the previous decade, namely:

The original ONS mid-year population estimates (including rolled-forward estimates for 2021) Experimental outputs from the ONS's Dynamic Population Model

The modelled population backseries produced by the GLA to act as inputs to our 2021-based interim population projections

The slides from the presentation are published here together with packages of comparison plots for all local authority districts and regions in England to allow users to easily view some of the key differences between the sources for their own areas. The plots also include comparisons of the Dynamic Population Model's provisional 2022 estimates of births with the modelled estimates of recent births produced by the GLA.

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Data links

Link to the data Format File added Data preview
gss_code_to_name_lookup.csv N/A 09 December 2025 Not available
rest_of_england.zip N/A 09 December 2025 Not available
london.zip N/A 09 December 2025 Not available
2023_04_04_PSUG_Population_Estimates.pdf N/A 09 December 2025 Not available

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