Sizing the Unauthorised (Illegal) Migrant Population in the United Kingdom in 2001

This site provides free access to online report 29/05 by Jo Woodbridge which was published by the Home Office in June 2005. It provides the first official estimates of the number of illegal immigrants in the UK in 2001. This is broken down by country and other variables. Information on the methodology used is supplied. Users should note that the paper is in pdf format and therefore requires access to an Adobe Acrobat Reader for use.