FOI reference: FOI-2024-2246
You asked
How many illegal immigrants have arrived in UK in each of the last ten years.
We said
Thank you for your Freedom of Information request asking the number of illegal immigrants in the UK.
We don't hold any data about illegal immigrants. Measuring illegal immigration, our current view remains our latest position about estimating illegal immigration.
However, the Home Office released Irregular migration to the UK, year ending June 2024 in August 2024 which includes Statistics on irregular migration to the UK, including small boats.