The International Court of Justice issued a 2019 advisory opinion stating that the UK's separation of the Chagos Archipelago from Mauritius in 1965 was unlawful, and that decolonisation of Mauritius was never legally completed. The UN General Assembly backed this position, calling on the UK to end its administration. However, no binding treaty has yet transferred sovereignty, and negotiations are ongoing.
What is the current status of the Chagos deal between Mauritius and the UK?β
A draft agreement was reached in principle in 2024 under which the UK would acknowledge Mauritian sovereignty over the Chagos Archipelago while retaining a 99-year lease on the Diego Garcia military base, shared with the United States. As of 2025, the deal has not been formally signed, with political resistance in both London and Washington cited as obstacles. Mauritius continues to assert that its sovereignty is non-negotiable.
Who are the Chagossians and why were they displaced?β
The Chagossians are the indigenous inhabitants of the Chagos Archipelago. Between 1968 and 1973, the UK forcibly removed approximately 1,500 Chagossians from the islands to facilitate the construction of a US military base on Diego Garcia. Many were resettled in Mauritius and the Seychelles, often in poverty. The right of return for Chagossians is a central element of Mauritius's negotiations with the UK.