The governments of Britain and Mauritius have reached a final deal to settle the future of the Chagos Islands, the contested archipelago in the middle of the Indian Ocean that's home to a strategically important U.

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 Chagos Islands are home to Diego Garcia, one of world's most secretive places and home to an important U.S. military base.