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Thursday 09/04/2026

UK Court Confirms Unlawful Detention of Migrants on Diego Garcia

UK court ruling on Sri Lankan migrants in Diego Garcia
Ethan BrooksEthan Brooks

In This Article

HIGHLIGHTS

  • An appeals court upheld a ruling that Sri Lankan migrants were unlawfully detained on Diego Garcia, a British territory, in 2021.
  • The British Indian Ocean Territory (BIOT) commissioner’s appeal was rejected, confirming the detention was illegal.
  • Migrants, including 16 children, lived in harsh conditions described as an "open prison" with incidents of self-harm and hunger strikes.
  • The UK government faces potential compensation claims, with detention costs previously reaching £108,000 per day.
  • Diego Garcia is part of the Chagos Islands, a region with a complex colonial history and ongoing sovereignty disputes.

An appeals court has reaffirmed a previous ruling that the detention of dozens of Sri Lankan migrants on Diego Garcia, a remote British territory, was unlawful. This decision, delivered on Tuesday, marks a significant legal victory for the migrants who were held in conditions described as "hell on Earth."

Background and Legal Context

The case centers on 64 Sri Lankan Tamils, including 16 children, who sought asylum on Diego Garcia after a shipwreck in 2021. They were detained in a fenced camp on the island, part of the British Indian Ocean Territory (BIOT), which also hosts a UK-US military base. The conditions in the camp were dire, with reports of rat-infested tents and inadequate facilities, leading to multiple hunger strikes and incidents of self-harm.

Court Ruling and Reactions

The BIOT commissioner, Nishi Dholakia, had appealed the initial ruling, arguing that the detention was necessary for the migrants' safety. However, the appeals court dismissed all grounds of the appeal, describing the evidence presented by the commissioner as "highly selective." Tom Short, a solicitor representing 39 of the migrants, hailed the decision as a "full vindication" of the earlier judgment. He criticized the commissioner for treating the migrants as prisoners without justification.

Financial and Political Implications

The UK government now faces the prospect of substantial compensation claims, with the detention previously costing taxpayers £108,000 daily. Simon Robinson, a lawyer for some of the migrants, emphasized the financial burden and criticized the delay in resolving the situation. A government spokesperson acknowledged the island was never suitable for long-term migrant accommodation, attributing the unresolved situation to the previous administration.

Historical and Geopolitical Context

Diego Garcia is part of the Chagos Islands, a region with a contentious colonial history. Originally part of Mauritius, the islands were ceded to the UK in exchange for Mauritius's independence in 1968. The UK later evicted over 1,000 Chagossians to establish the military base. Last year, the UK agreed to return the islands to Mauritius, though the sovereignty dispute remains a sensitive issue.

WHAT THIS MIGHT MEAN

The court's decision could lead to significant financial liabilities for the UK government, as compensation claims from the detained migrants are likely to follow. This ruling also highlights the ongoing geopolitical tensions surrounding the Chagos Islands, with Mauritius continuing to assert its claim over the territory. The case may prompt further scrutiny of the UK's immigration and asylum policies, particularly regarding the treatment of migrants in overseas territories. Legal experts suggest that this ruling could set a precedent for future cases involving the detention of asylum seekers in similar circumstances.