Britain is giving up sovereignty of a remote group of islands in return for securing the long-term future of a strategically important military base.
The UK Government said it has reached a political agreement with Mauritius over the Chagos Islands, also known as the British Indian Ocean Territory, following negotiations which began in 2022.
Mauritius will assume sovereignty over the Indian Ocean archipelago while the joint US-UK military base remains on Diego Garcia, the largest of the islands.
The Foreign Office said the agreement is supported by the US and means the status of the base will be undisputed and legally secure.
Chagossians were forced to leave the central Indian Ocean territory by 1973 to make way for the military base.
The expulsions are regarded as one of the most shameful parts of Britain’s modern colonial history and Chagossians have spent decades fighting to return to the islands.
The United Nations’ highest court, the International Court of Justice, previously ruled the UK’s administration of the territory was “unlawful” and must end.
Foreign Secretary David Lammy said: “This Government inherited a situation where the long-term, secure operation of the Diego Garcia military base was under threat, with contested sovereignty and ongoing legal challenges.
“Today’s agreement secures this vital military base for the future.
“It will strengthen our role in safeguarding global security, shut down any possibility of the Indian Ocean being used as a dangerous illegal migration route to the UK, as well as guaranteeing our long-term relationship with Mauritius, a close Commonwealth partner.”
The Foreign Office said the agreement is subject to a treaty and supporting legal instruments being finalised, adding that both sides have committed to complete this as quickly as possible.
A Downing Street spokesman said Prime Minister Sir Keir Starmer spoke to his Mauritius counterpart, Pravind Jugnauth, on Thursday morning.
The spokesman said: “The leaders began by welcoming the political agreement achieved today between the UK and Mauritius on the exercise of sovereignty over the Chagos archipelago after two years of negotiations.
“The Prime Minister reiterated the importance of reaching this deal to protect the continued operation of the UK/US military base on Diego Garcia.
“He underscored his steadfast duty to national and global security which underpinned the political agreement reached today.”
This is a shameful betrayal by Labour. The right of self determination of the Chagosian people has been disregarded. No territory of the Crown should be handed away without consent. The loyal people of all UK's Overseas Territories will shudder at this announcement. 🇬🇧🇮🇴 https://t.co/ld1ZkhfUCk
— Andrew Rosindell MP 🇬🇧🏴 (@AndrewRosindell) October 3, 2024
Andrew Rosindell, the Conservative MP for Romford, wrote on social media platform X: “This is a shameful betrayal by Labour.
“The right of self-determination of the Chagossian people has been disregarded. No territory of the Crown should be handed away without consent.
“The loyal people of all UK’s Overseas Territories will shudder at this announcement.”
