France's Interior Minister Laurent Nunez (C-L) and British Home Secretary Shabana Mahmood (C-R) visit the future centre de rétention administrative (CRA, immigration detention centre) of Loon-Plage, near Dunkirk, on April 23, 2026.a. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

France's Interior Minister Laurent Nunez (C-L) and British Home Secretary Shabana Mahmood (C-R) visit the future centre de rétention administrative (CRA, immigration detention centre) of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

British Home Secretary Shabana Mahmood (L) and France's Interior Minister Laurent Nunez (2nd L) speaks with French Border Police officers after they renew the Sandhurst treaty at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

France's Interior Minister Laurent Nunez looks on prior to renew the Sandhurst treaty with British Home Secretary at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

France's Interior Minister Laurent Nunez looks on prior to renew the Sandhurst treaty with British Home Secretary at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

British Home Secretary Shabana Mahmood listens to France's Interior Minister's speech prior to renew the Sandhurst treaty at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

British Home Secretary Shabana Mahmood (L) and France's Interior Minister Laurent Nunez (2nd L) speaks with French Border Police officers after they renew the Sandhurst treaty at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)

British Home Secretary Shabana Mahmood listens to France's Interior Minister's speech prior to renew the Sandhurst treaty at the Border Police office of Loon-Plage, near Dunkirk, on April 23, 2026. Britain and France have agreed a new three-year deal to stop undocumented migrants making the risky journey across the Channel in small boats, the two sides announced. Under the deal, France pledged to increase law enforcement on the coast by more than half to fight irregular migration to Britain -- reaching 1,400 officers by 2029. The Sandhurst treaty sets out the UK's financial contribution to French efforts to stop migrants attempting the perilous sea crossing to Britain. (Photo by Sameer AL-DOUMY / AFP via Getty Images)