Written Question·Home Office·UIN 14511
Undocumented Migrants
Tabled: 30 June 2026
Answered: 14 July 2026
Question
Mr Andrew Snowden
Conservative — Fylde
To ask the Secretary of State for the Home Department, what methodology was used to estimate the figure of 412,000 illegal migrants in the United Kingdom.
Answer
Alex NorrisThe figure was derived from a review of Home Office case working systems and includes individuals who are believed to be in the UK and do not have valid leave recorded. The figure also includes foreign nationals who hold valid leave but are being consider...
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