Corrections and notices

Corrections

02 March 2026

We have made several corrections to the data. As a result of these corrections, the mean error and mean percentage error figures have also been recalculated. Please be aware these corrections affect the analyses in this release but do not affect the national population projections (NPPs) themselves.

We have also made further changes to improve the consistency of the overall formatting of the datasets. Some total population, deaths and births time series have been increased or decreased in length to match the rest of the datasets. Some figures for the UK NPPs were initially rounded, but have been changed to unrounded when that data was available.

These corrections affect all figures within the release except Figure 3, and the following datasets:

  • Comparison of mid-year population estimates with projections, UK and constituent countries

  • Comparison of deaths estimates with projections, UK and constituent countries

  • Comparison of births estimates with projections, UK and constituent countries

  • Comparison of fertility estimates with projections, UK and constituent countries

  • Comparison of international migration estimates with projections, UK and constituent countries

  • Comparison of life expectancy estimates with projections, UK and constituent countries 

  • Comparison of old age dependency ratio estimates with projections, UK and constituent countries

We have also updated the text where necessary. We apologise for this correction.

Notices

28 January 2025

This dataset has been updated with corrected links. The data have not been affected.

About this Dataset

Comparison of mid-year population estimates with 1971-based to 2022-based national population projections for the UK and constituent countries, including measures of error.

Edition in the dataset

Current edition of this dataset

Previous versions of this data are available.

Manylion cyswllt ar gyfer y set ddata hon

Population and Household Projections
pop.info@ons.gov.uk
+44 1329 444661