Keir Starmer says the deal - which involves leasing the Diego Garcia base for 99 years, with the option of another 40 - is in the UK's national interest.

The governments of Britain and Mauritius have reached a final deal to settle the future of the Chagos Islands but have been barred from signing it by a British judge.

A ceremony transferring sovereignty of the British Indian Ocean Territory of the Chagos Islands to Mauritius was called off at the last moment after the High Court in London granted an injunction to islanders.