UK says France funding depends on migrant centre opening, legal challenge looms
Britain has tied funding to a French migrant centre opening near Dunkirk, but a court appeal in Lille could still delay the site and test the small-boats deal.
The UK has tied part of its migration funding to a detention centre in France actually opening, putting one of Keir Starmer’s key small-boats measures at the mercy of a French court fight over planning rules and local opposition.
The centre, planned for Loon-Plage near Dunkirk, is expected to hold 140 people. The Home Office has said Britain will not pay if the site does not open, and funding from a £160 million pot could be withdrawn if the wider deal fails to deliver proven results within its first year. The construction project sits at the heart of a £662 million three-year funding cycle agreed in April 2026, designed to support French enforcement in northern France and new tactics aimed at crossings of the English Channel.
The legal challenge comes from ADELFA, the Flemish-Artois Coastal Environmental Defense Assembly, which appealed to the Administrative Court of Lille in February after an earlier challenge was rejected. The group argues the site sits in an industrial zone where residential accommodation is not allowed under planning rules. Its lawyers also say the location is close to industrial facilities, including a warehouse with ammonia refrigeration, which creates significant health risks for occupants. French legal experts have said the building permit could be revoked if the appeal succeeds, even though construction can continue for now.
The timing matters because the UK-France treaty that underpins the pilot one-in-one-out scheme came into force on 4 August 2025. Under that arrangement, people arriving on small boats can be detained and returned to France, while an equal number of vetted applicants may come to the UK through a legal route. Shabana Mahmood said when the deal was signed in France last month that it would help "restore order and control to our borders".
The political stakes are high for Starmer, who faces pressure to reduce the number of people attempting the Channel crossing. The House of Commons Library said small boats accounted for 89% of detected irregular arrivals and around 40% of asylum claims in 2025. France has also signaled a broader enforcement push, with a roadmap reported by France 24 saying coastal policing will rise to 1,400 officers by 2029 and nearly a quarter of UK funding will be conditional on results.
The current arrangement extends a pattern of cross-Channel cooperation that began with the Sangatte Protocol in 1991 and later the Treaty of Le Touquet in 2003 and the Sandhurst Treaty in 2018. Britain first agreed in 2023 to help fund a detention centre in France under a €541 million three-year deal, but the latest version is more explicit about performance and payment. If the Loon-Plage site stalls in court, the UK’s attempt to outsource control of the Channel may be exposed as dependent not just on policing, but on French judges and French local planning law.
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