Improvements in Estimating Migration

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Greater London Authority
Last updated:
16 June 2025
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Summary

On 17th November 2011 the Office for National Statistics (ONS) as part of their Migration Statistics Improvement Programme (MSIP) released their improved methodology for producing local authority long-term migration estimates within England and Wales.

This Update presents a brief overview of the improved migration methodology adopted by the ONS in respect to its impact on migration and population estimates.

  • Improvements to the immigration distributional methodology has impacted on both the estimated number of migrants and total population between 2006 and 2010.

  • The number of immigrants in London as a result is estimated to have risen by 129.8 thousand (2006 to 2010) compared to previous figures.

  • Ten London boroughs are in the top 20 local authorities for upward indicative revisions in their population estimates.

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intelligence-update-12-2012-migration.pdf N/A 16 June 2025 Not available
update-12-2012-MSIP-data.xls N/A 16 June 2025 Not available

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