Chagos Archipelago, known by the more Imperial title of the Oil Islands, and which the Colonial Office List described as being ‘four days’ steaming’ from Mauritius.
Such was the situation in early 1965, when Mauritius was beginning to make noises about becoming independent. A Labour Government was in office in London (nearly all the protagonists in this story are members of the Labour Party, the significance of which will become clear later), and its then Colonial Secretary, Anthony Greenwood, flew to the Mauritian capital with some startling news. The islanders, he said, could indeed have their independence from Britain, but only on condition that they gave up their claim to the islands of the Chagos Archipelago, 1,200 miles away, and in perpetuity: Mr Greenwood gave no reason, but offered three million pounds in compensation, which the local politicians eventually decided to accept.
This accomplished, the Colonial Secretary then flew north to the Seychelles, and informed the Colonial Government there—which was not yet thinking of independence—that its three principal dependencies of Farquhar, Desroches and Aldabra were also being removed from the bailiwick, and the sovereignty of these scraps of sand and coral and giant tortoises was being passed back to London herself. No one knew why, until November, when a brief announcement was made in the House of Commons. The four island groups were to be made into a brand-new colony, to be named British Indian Ocean Territory; they would be administered by a Commissioner, who would be based at Victoria, in the Seychelles; they would use the currencies of the Seychelles and Mauritius and the stamps of Mauritius; and they would be run according to British colonial law ‘unless modified by the Order in Council of 8th November 1965’, the document that formally established this new, self-standing possession.
It was more than a year before anyone realised why London had gone to the time and trouble to set up a new dependent territory that was so scattered and so seemingly useless. On 30th December 1966, all was answered: Britain and the United States signed an Exchange of Notes ‘concerning the availability for Defence Purposes’of the islands. The Notes were voluminous—eleven main sections, and two annexes with more than fifty sub-paragraphs (which covered all known contingencies, including a specific ban on the United States executing anyone on the islands)—but essentially said one thing. America was given permission to lease the islands for fifty years (with an option on a further twenty) without payment, and to build a defence installation there, to suit such needs ‘as might arise’.
Lord Chalfont, another Labour minister, signed the Government’s acceptance of the Notes (on behalf of his Foreign Secretary, George Brown) and the matter became law—without even the most perfunctory debate in Parliament, and with virtually no publicity. It was in any case generally accepted that to have some Western defence outpost in the region was prudent: the only other bases in the Indian Ocean at the time were the RAF base at Gan, an atoll in the southern part of the Maldive Islands chain, and Aden. Even the least prescient Imperialist would realise that these would eventually be abandoned (as indeed they were: the British were forced out of Aden in November 1967, and voluntarily left Gan in March 1976). Given the general instability of the region, and the absolute necessity of guaranteeing the free flow of Gulf oil, Washington and London seized on the notion of keeping the islands of BIOT for their very own, in case the need arose.
Inexorably and, perhaps, inevitably, the forces moved in. First there was an agreement signed in 1972 (under a Tory government—the only publicly admitted deal that involved a Conservative administration) to allow the US Navy to erect ‘a limited communications facility’ on the island of Diego Garcia, at the southern end of the Chagos