evidence: Diego Garcia is one of about 60 islands that make up the Chagos Archipelago or British Indian Ocean Territory (Biot) - the last colony established by the UK by separating it from Mauritius in 1965. It is located about halfway between East Africa and Indonesia. [...] Mauritius, which won independence from the UK in 1968, maintains that the islands are its own and the United Nations' highest court has ruled, in an advisory opinion, that the UK's administration of the territory is "unlawful" and must end. It said the Chagos Islands should be handed over to Mauritius in order to complete the UK's "decolonisation".