British Home Secretary Shabana Mahmood (L) and France's Interior Minister Laurent Nunez 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)