(FILES) Britain's Prime Minister Keir Starmer (L) and France's President Emmanuel Macron (R) embrace during a joint press conference following a meeting of the Coalition of the Willing at a military base at Northwood Headquarters in north-west London, on July 10, 2025. A "one-in, one-out" deal in which Britain can return some migrants who cross the Channel in small boats back to France came into force on Tuesday, August 5, the UK government announced. (Photo by Leon Neal / POOL / AFP)