This is one of a series of reports prepared under the provisions of the Statistics and Registration Service Act 2007. The Act gives the Statistics Authority power to re-assess whether the Code of Practice for Official Statistics continues to be complied with in relation to official statistics already designated as National Statistics. The report covers the sets of statistics produced by the Office for National Statistics (ONS) and reported in:

• Migration Statistics Quarterly Report (MSQR); and

• Internal Migration by Local Authorities in England and Wales (IM).

The previous assessment of these sets of statistics was reported in Assessment report. They have been re-assessed as part of the Statistics Authority’s ongoing programme of re-assessment. This is discussed further in annex 4.

This report was prepared by the Authority’s Assessment team, and approved by the Assessment Committee on behalf of the Board of the Statistics Authority, based on the advice of the Head of Assessment.

Migration Statistics: Letter of Confirmation as National Statistics