The UK government’s “one-in, one-out” policy aimed at managing the Channel migrant crisis has had minimal impact on reducing the number of small boat arrivals, according to recent data and expert analysis. Between 2018 and 2025, a total of 96,002 asylum seekers from Afghanistan, Iran, Iraq, and Eritrea arrived in the UK via small boats crossing the English Channel. Despite efforts to increase removals, only 495 individuals—around 0.5% of that total—have been deported to these four countries over the seven-year period. More returns have occurred to Ireland (57) than to Syria (55) or Afghanistan (16).

The low deportation numbers highlight the UK's reliance on international cooperation, particularly with France, to manage migration flows. The Labour government has increasingly depended on France not only to prevent crossings but also to accept the return of migrants, many of whom have traditionally been challenging to repatriate. However, diplomatic complexities and legal protections limit returns. Many migrants originate from countries considered unsafe, which restricts the UK’s ability to send them back under international law, even if their asylum claims are rejected.

Research from the Migration Observatory at the University of Oxford emphasizes the scale of arrivals by nationality: 27,422 Afghans, 19,154 Eritreans, 30,269 Iranians, 19,157 Iraqis, and 14,744 Syrians crossed the Channel during the seven years studied. This underscores how much the UK’s border management depends on cooperation with other states.

Experts note that external factors, including the willingness of partner countries to cooperate on returns, remain crucial. David Capps from the Migration Observatory pointed out that many migrants cannot be forcibly returned due to protections under international conventions. This ongoing challenge has influenced government discussions about Britain’s relationship with the European Convention on Human Rights (ECHR), with some Conservative figures calling for reforms to facilitate deportations.

Home Secretary Nasim Mahmood has introduced measures aimed at reducing the appeal of the UK for asylum seekers. These include requiring migrants to repay hotel accommodation costs, potentially amounting to around £10,000 per individual, and extending the wait times for settlement rights after refugee status is granted. Mahmood has instructed asylum officials to discount claims based on Article 8 of the ECHR regarding the right to family life if family units were formed while individuals were in the UK illegally.

Despite these policies, crossings remain significant, with recent months seeing thousands of migrants continuing to risk dangerous Channel crossings. Labour’s Shadow Home Secretary, Andy Burnham, noted a 42% reduction in crossings compared to the previous year, though critics argue this falls short of effectively dismantling the smuggling networks that facilitate these journeys. Analysts suggest that without the capacity to return more migrants swiftly, criminal gangs will continue to exploit the situation.

The government faces ongoing challenges in balancing humanitarian obligations with border control. Current efforts primarily aim to limit the impact of irregular migration, but removing enough individuals to deter smuggling operations remains elusive. As a result, the Channel crossing crisis persists as a complex and contentious policy issue for the UK.