The coherence of migration statistics is an important part of the work ONS are doing to transform the way we produce population and migration statistics for our users. This article 1) explains how we arrived at the revised back series to be used for rebasing of mid-year population estimates, 2) sets out how migration has changed over the decade, 3) assures that new methods are robust.

The United Kingdom Statistics Authority has designated these statistics as National Statistics, in accordance with the Statistics and Registration Service Act 2007 and signifying compliance with the Code of Practice for Official Statistics.

Designation can be broadly interpreted to mean that the statistics:

  • meet identified user needs
  • are well explained and readily accessible
  • are produced according to sound methods
  • are managed impartially and objectively in the public interest

Once statistics have been designated as National Statistics it is a statutory requirement that the Code of Practice shall continue to be observed.