UK-France One In, One Out Deal to Expire Thursday
The UK-France "one in, one out" returns arrangement for small-boat arrivals is expected to expire on Thursday 1 October, according to UK government sources cited by The Guardian.
Officials in London describe negotiations as stalled. Paris is pressing for a Europe-wide arrangement instead of a bilateral exchange and has resisted scaling up the numbers to be swapped. Home Office staff and French counterparts are continuing talks in Paris on how to close out the pilot. Removal flights for people already detained under the scheme will continue in the short term. They are expected to end within weeks.
The scheme was announced by Prime Minister Keir Starmer and President Emmanuel Macron in July 2025. The underlying treaty came into force on 6 August, with London saying on 4 August 2025 it would begin implementation within days, according to Reuters. The first flights took off in September 2025. Britain announced on 18 September 2025 that the first migrant had been returned to France under the agreement. Days later, on 23 September 2025, the UK lost an appeal over a block on the removal of an asylum seeker under the deal.
The mechanism allowed the UK to detain and rapidly remove people who entered illegally via small boats, as described in the UK government notice of the first return. Each arrival returned to France was to be matched by the admission to the UK of another person, described as an asylum seeker with links to the UK held in France.
More than 1,400 people who arrived in the UK via small boats have been sent back to France under the deal. A reciprocal number have been flown in the other direction. The pilot had originally been set to expire in April. In May 2026 the two sides agreed to extend it to 1 October to cover the anticipated summer increase in crossing attempts. France treats the text signed in August 2025 as a time-limited pilot not intended to run beyond 1 October 2026, a position attributed to Interior Minister Laurent Nuñez.
The cost and the operational record remain contested. Home Secretary Shabana Mahmood told MPs the deal cost about £56,000 for every person sent back to France. Between January and 27 September, 19,135 people crossed the Channel by small boat from France, down 42% on the same period the previous year. That recent fall follows a sharp rise the year before. Small-boat arrivals in the year ending September 2025 totalled 45,659, 53% more than in the year ending September 2024, according to Home Office statistics. Returns of small-boat arrivals in the year ending December 2025 were the highest in a 12-month period since recording began in 2018. Separately, the UK agreed to pay France £16.2 million to patrol beaches, as reported by the BBC.
The broader context here is a familiar tension in bilateral migration control. London sought a deterrent effect through swift, enforceable returns. Paris sought burden-sharing beyond the Channel coast and leverage for a wider EU framework. Neither objective was fully reconciled inside a numerically limited pilot.
Looking at what this means for policymakers, three questions carry weight. First, whether the 42% decline this year reflects deterrence, weather and enforcement variables, or displacement to other routes. Second, whether an EU-wide returns or asylum processing arrangement is negotiable on a timetable useful to either government. Third, how detention and removal capacity will be used once the legal basis for this specific exchange lapses. The answers will shape Channel policy after 1 October more than the final winding-down flights.
