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.