Undocumented Migrants

Home Office written question – answered at on 21 February 2024.

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Photo of Lord Rosser Lord Rosser Labour

To ask His Majesty's Government what is their estimate of the current number of individuals who are in the United Kingdom illegally.

Photo of Lord Sharpe of Epsom Lord Sharpe of Epsom The Parliamentary Under-Secretary of State for the Home Department

By its very nature, it is not possible to know the exact size of the illegal population, or the number of people who arrive illegally, and so we do not seek to make any official estimates of the illegal population. In June 2019, the Office for National Statistics (ONS) published a note on ‘measuring illegal migration’.

The Home Office does publish statistics on irregular arrivals to the UK as part of the ‘Irregular migration to the UK’ quarterly statistics release on gov.uk. However, this does not indicate the number of irregular migrants currently in the UK.

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