The UK-France migration deal has led to nearly 100 children being wrongly detained as adults, according to a new disclosure. This alarming statistic raises serious concerns about child safeguarding and the effectiveness of age assessment procedures under the controversial 'one in, one out' initiative.
What Is the UK-France Migration Deal?
The 'one in, one out' deal, launched in August 2025, allows the UK to send some people who arrive by small boat back to France, while agreeing to accept the same number of individuals from France who are judged to have legitimate claims. The scheme was designed to deter illegal crossings and streamline asylum processing, but it has come under fire for its impact on vulnerable individuals.
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Age Disputes Under the Scheme
According to a letter from Jane Leech, interim chair of independent monitoring boards (IMBs), between 15 August 2025 and 1 May 2026, there were 304 age-disputed cases. Of these, 94 (31%) were ultimately assessed to be minors. This means that nearly one in three individuals initially treated as adults were actually children, violating the scheme's stated exclusion of minors.
The letter, sent to Home Office minister Anna Turley, criticizes the ineffectiveness of child safeguarding mechanisms and calls for better measures to prevent detention of age-disputed individuals. The IMB also highlighted that some detainees had been awaiting deportation for more than six months, despite the 28-day maximum intended for exceptional cases.
Key Concerns Raised by the IMB
- Incorrect age assessments: 31% of age-disputed cases were found to be children.
- Prolonged detention: Some individuals held over six months, far exceeding the 28-day guideline.
- Health risks: People with tuberculosis or needing hospital treatment were prepared for removal.
- Family separation: Detainees were separated from family members they traveled with, causing 'particularly damaging impact.'
Data Table: Age Disputes and Outcomes
| Period | Total Age Disputes | Found to be Minors | Percentage Minors |
|---|---|---|---|
| Aug 2025 - May 2026 | 304 | 94 | 31% |
Impact on Vulnerable Individuals
The scheme places 'highly vulnerable, newly arrived individuals, including children and survivors of abuse, in detention,' Leech wrote. The prolonged detention and family separation exacerbate trauma, making the deal not only a legal but a humanitarian concern. The IMB's findings suggest that the current age assessment process is flawed, leading to wrongful detention of minors.
What Needs to Change?
To address these issues, the IMB recommends that age-disputed individuals should not be detained in the first place, and that age assessments should be completed more quickly. The government must ensure that child safeguarding mechanisms are effective and that the scheme complies with legal protections for minors.
FAQ
What is the 'one in, one out' migration deal?
The 'one in, one out' deal is an agreement between the UK and France that allows the UK to send some small boat arrivals back to France, while accepting an equal number of people from France with legitimate claims.
How many children were detained under this deal?
Nearly 100 children (94) were wrongly detained as adults out of 304 age-disputed cases, representing 31% of those cases.
What are the main criticisms of the scheme?
Criticisms include ineffective child safeguarding, prolonged detention beyond 28 days, removal of sick individuals, and family separation, all of which harm vulnerable people.
Conclusion
The UK-France migration deal has led to serious safeguarding failures, with nearly 100 children detained as adults. The IMB's findings highlight urgent need for policy reform to protect minors and ensure humane treatment. For more expert analysis on immigration and policy, stay tuned to GrandGoldman.
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