In a landmark move, the United Kingdom has agreed to transfer sovereignty over the Chagos Islands to Mauritius, while maintaining a 99-year lease on the strategic military base of Diego Garcia. This decision, which has been met with both praise and criticism, comes after decades of legal battles and diplomatic negotiations.
The Chagos Islands, an archipelago in the Indian Ocean, have long been a source of contention between the UK and Mauritius. Formerly part of the British Indian Ocean Territory, the islands were detached from Mauritius in 1965, three years before the latter gained independence. This move was widely seen as a violation of the decolonization process, and the International Court of Justice (ICJ) ruled in 2019 that the UK’s continued administration of the archipelago was unlawful.
Under the new agreement, Mauritius will assume sovereignty over the Chagos Islands, while the UK will retain control of the Diego Garcia military base, which it operates jointly with the United States. The deal ensures the continued effective operation of this strategic facility, which has been a crucial asset for the UK and US in the region.
The financial terms of the agreement have also been disclosed. The UK government estimates the average annual cost during the initial 99-year period of the treaty to be £101 million in 2025-26 prices, with a total projected cost of £3.4 billion using a net present value methodology.
The political reaction to this decision has been mixed. While the US government has expressed support, citing the need to secure the long-term, stable, and effective operation of the Diego Garcia base, former US President Donald Trump has criticized the move, describing it as an “act of great stupidity.” Similarly, the Conservative opposition in the UK has condemned the agreement, arguing that it amounts to a “surrender” and a “surrender tax” to Mauritius.
However, the current Labour government, led by Prime Minister Keir Starmer, has defended the decision, stating that it was necessary to ensure legal certainty and prevent potential challenges in international courts. Starmer has emphasized the importance of respecting international law and maintaining the effective operation of the Diego Garcia base.
As the treaty makes its way through the UK Parliament, the debate over the Chagos Islands’ future is likely to continue. The resolution of this long-standing dispute represents a significant milestone in the decolonization process, but it also highlights the complex geopolitical and strategic considerations at play.
