The UK has signed a £3.4bn ($4.6bn) deal to hand over sovereignty of the Chagos Islands to Mauritius, while retaining control of a UK-US military base on Diego Garcia - the largest of the islands. Prime Minister Sir Keir Starmer says the 99-year agreement to lease back Diego Garcia will cost the UK £101m a year,

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.

The Chagos Islands are in the middle of the Indian Ocean and home to a strategic military base on Diego Garcia.