A flag is seen on a building during the Human Rights Council at the United Nations in Geneva, Switzerland February 27, 2023. — ReutersGENEVA: Britain´s deal to hand the Chagos Islands to Mauritius fails to guarantee the rights of the Chagossian people, a group of United Nations experts said on Tuesday.The agreement announced last month maintains British and US control of a key military base on the Indian Ocean archipelago´s largest island, Diego Garcia. The deal will see Britain pay...