Created a year ago, updated 10 months ago

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

Modelled annual estimates of population from mid-2011 to mid-2021 for 2021 local authority districts and regions in England and Wales

These are an updated version of the original series published in February 2023. The modelling process used for these updated estimates has been improved to give results that better align with the official 2021 mid-year population estimates.

From
30/06/2011
To
30/06/2021

*14 July 2023 - these have now been superseded

Modelled annual estimates of population from mid-2011 to mid-2021 for 2021 local authority districts and regions in England and Wales


From
01/07/2011
To
30/06/2021

*Large file* Detailed annual internal migration flows by age, sex, origin and destination for years ending mid-2012 to mid-2021. Data up to year ending mid-2020 are based directly on the original estimates published by ONS. Data for the year ending mid-2021 is modelled by the GLA. These data are published on 2021 boundaries.

  Local Authority
From
01/07/2001
To
30/06/2020

Detailed annual migration flows by origin and destination from 2002 to 2020. Original data published by ONS. Series processed to consistent 2021 geography by GLA. Data is an input into process of modelling detailed 2021 flows and published here to allow results to be more easily reproduced.