NATIONAL STATISTICS QUALITY REVIEW ON COMMAND PAPER “CONTROL OF IMMIGRATION STATISTICS: UNITED KINGDOM” PUBLICATIONS / Home Office, January 2007
PDF - http://www.homeoffice.gov.uk/rds/pdfs07/cpreview07.pdf
"The final report of this review was published on the National Statistics and Home Office [PDF] websites on 22 August 2006.
The table below details the actions planned to implement the 11 recommendations of the review, priority for new work being given to the first five recommendations. Further details of the recommendations are in Chapter 8 of the report."