These modelled annual population estimates were created by the GLA demography team as inputs to the 2021-based interim projections. They are intended to provide a consistent series of annual population and components of change between the official 2011 and 2021 estimates.
The official mid-year population estimates published by ONS are available here.
The original detailed internal migration data published by ONS is available here.
A technical note and accompanying code detailing the methodology used to create these estimates is planned for release in the coming weeks. In the meantime, an overview of the approach is described in this presentation delivered at the 2022 BSPS conference.
* 17 April 2023 code for producing the modelled 2021 detailed internal migration flows is now available on Github
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