modelled_backseries.csv
type: Distribution
description: *14 July 2023 - these have now been superseded Modelled annual estimates of population from mid-2011 to mid-2021 for 2021 local authority districts and regions in England and Wales
issued: 2026-08-13T10:07:25.692259
modified: 2026-08-13T10:07:25.616335

origin_destination_2002_2022_(2023_geog).rds
type: Distribution
description: Detailed annual migration flows by origin and destination from 2002 to 2022. Original data published by ONS. Pre-2012 data processed to consistent 2023 geography by GLA. This file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692254
modified: 2026-08-13T10:07:25.616099

population_lsoa11_2010_to_2011.csv
type: Distribution
issued: 2026-08-13T10:07:25.692264
modified: 2026-08-13T10:07:25.616596

origin_destination_2002_to_2020_(2021_geog).rds
type: Distribution
description: 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.
issued: 2026-08-13T10:07:25.692260
modified: 2026-08-13T10:07:25.616410

gla_modelled_estimates_series_WD22_London_2011_2022_wide.csv
type: Distribution
description: Modelled estimates of population and annual components of change from mid-2011 to mid-2022 for electoral wards (2022 geography) in London. The estimates were produced for use in the GLA 2022-based population projections.
issued: 2026-08-13T10:07:25.692257
modified: 2026-08-13T10:07:25.616258

modelled_backseries (updated 14-07-2023).csv
type: Distribution
description: *18 July 2024 - estimates including more recent ONS mid-year estimates are now available Modelled annual estimates of population from mid-2011 to mid-2021 for 2021 local authority districts and regions in England and Wales. The estimates were produced for use in the GLA interim 2021-based population projections. 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.
issued: 2026-08-13T10:07:25.692258
modified: 2026-08-13T10:07:25.616298

population_lsoa11_2010_to_2011.rds
type: Distribution
description: Small area (LSOA 2011) population estimates for 2010 and 2011. Used as an input into the small area population backseries. The file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692262
modified: 2026-08-13T10:07:25.616522

full_modelled_estimates_series_EW(2023_geog).rds
type: Distribution
description: Modelled estimates of population and annual components of change from mid-2001 to mid-2023 for local authority districts (2023 geography) in England and Wales. These estimates were produced for use in the GLA 2023-based population projections. This file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692257
modified: 2026-08-13T10:07:25.616218

population_msoa11_2010_to_2011.csv
type: Distribution
issued: 2026-08-13T10:07:25.692263
modified: 2026-08-13T10:07:25.616559

gla_modelled_estimates_series_LAD_EW_2001_2023_(2023_geog)_wide.csv
type: Distribution
description: Modelled estimates of population and annual components of change from mid-2001 to mid-2023 for local authority districts (2023 geography) in England and Wales. These estimates were produced for use in the GLA 2023-based population projections.
issued: 2026-08-13T10:07:25.692256
modified: 2026-08-13T10:07:25.616179

2002 to 2024 full_series_lad.rds
type: Distribution
description: Detailed annual migration flows by origin and destination from 2002 to 2024. Original data published by ONS. Pre-2012 data processed to consistent 2023 geography by GLA. This file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692251
modified: 2026-08-13T10:07:25.615986

gla_modelled_estimates_series_LAD_EW_2001_2022_(2021_geog)_wide.csv
type: Distribution
description: Modelled estimates of population and annual components of change from mid-2001 to mid-2022 for local authority districts (2021 geography) in England and Wales. These estimates were produced for use in the GLA 2022-based population projections.
issued: 2026-08-13T10:07:25.692255
modified: 2026-08-13T10:07:25.616140

population_msoa11_2010_to_2011.rds
type: Distribution
description: Small area (MSOA 2011) population estimates for 2010 and 2011. Used as an input into the small area population backseries. The file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692262
modified: 2026-08-13T10:07:25.616485

2001 to 2024 full_modelled_estimates_series_EW(2023_geog).rds
type: Distribution
description: Modelled estimates of population and annual components of change from mid-2001 to mid-2024 for local authority districts (2023 geography) in England and Wales. These estimates were produced for use in the GLA 2024-based population projections. This file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692253
modified: 2026-08-13T10:07:25.616054

resident_pupils_lea_ncy_2011_2019_from_cbm.csv
type: Distribution
description: Location-based pupil population data. Used as an input to the process of adjusting the backseries to account for inaccuracies in estimates of young children.
issued: 2026-08-13T10:07:25.692264
modified: 2026-08-13T10:07:25.616633

origin_destination_lad_2012_2021.csv
type: Distribution
description: *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.
issued: 2026-08-13T10:07:25.692259
modified: 2026-08-13T10:07:25.616372

Modelled population backseries
type: Dataset
keyword: population
keyword: internal migration
keyword: demography
landing page: https://data.london.gov.uk/dataset/modelled-population-backseries-ex9jd
description: These modelled annual population estimates were created for use the GLA's population projections. They are intended to provide a consistent series of annual population and components of change between census years with all change accounted for by the standard components of change (births, deaths, and migration). The official mid-year population estimates published by ONS are available here. The original detailed internal migration data published by ONS is available here. An overview of the general approach used to create these estimates 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
issued: 2023-02-08T12:41:44+00:00
modified: 2026-05-12T14:32:41.219000+00:00
publisher: Greater London Authority

mye_1991_2000_nomis.rds
type: Distribution
description: Annual population estimates for local authority districts from 1991 to 2000. Data are mid-year population estimates produced by ONS and published on NOMIS. This file is in the .rds format native to R.
issued: 2026-08-13T10:07:25.692261
modified: 2026-08-13T10:07:25.616448