Argentine President Javier Milei has escalated tensions with the United Kingdom over the Falkland Islands, warning that his government will impose economic sanctions on energy companies planning to exploit oil resources near the British overseas territory.
In a national address delivered from the presidential palace, surrounded by his cabinet, Milei said the "winds of change" favoured Argentina's claim to the islands. He cited signs that the United States might reconsider its longstanding position of neutrality on the sovereignty dispute.
Milei described the Sea Lion oilfield, where a British and an Israeli company are due to begin exploration work, as a "clear and present danger." He reiterated that the Falklands were "historically and legally" Argentinean.
"If we do not act swiftly in a few months, they will have the material capacity to access the oil that lies underneath our sea — something that has never happened before," Milei said.
The Sea Lion oilfield lies approximately 130 miles from the islands and contains an estimated 1.7 billion barrels of oil. Britain's Rockhopper Exploration and Israel's Navitas Petroleum are due to begin extraction within two years. Rockhopper has described the field as containing "highly marketable crude." Navitas has said it is already carrying out preparatory work, including building a dock, a heliport and accommodation for oil workers.
In a joint statement, Rockhopper and Navitas said they believed "the recent developments are not expected to have a material effect on the development activities of the Sea Lion Project, including the timetable for completion of the Project's development."
Milei's proposal centres on introducing a bill in parliament to impose sanctions on energy firms involved in the exploration. It remains unclear precisely how or to what extent the measures would be enforced. Argentina already has existing legislation that allows restrictions on oil companies participating in projects deemed unauthorised in the islands.
The UK government responded firmly. Foreign Secretary Ed Miliband said Britain's position on the islands was "unwavering," and that they would remain British as "that is the overwhelming position of the Islanders." Downing Street reaffirmed that the islands would remain a British Overseas Territory "for as long as the Islanders wish."
"This is not the first time Argentine governments have made economic threats against the islanders. We are clear that the Falkland Islanders' right of self-determination extends to the right to exploit their own natural resources," a government spokesperson said.
Defence Secretary Wes Streeting described Britain's commitment to the Falkland Islands as "absolute and unshakeable." Writing on X, he said: "Milei's statement overnight tells us more about domestic politics in Argentina than it does about the Falkland Islands."
Sovereignty over the archipelago in the south-west Atlantic Ocean has remained disputed between Britain and Argentina for more than 40 years since the 1982 war. In a 2013 referendum, residents voted overwhelmingly to remain a British overseas territory, with 99.8% in favour and just three votes against.
Teslyn Barkman, a former member of the Falkland Islands Legislative Assembly, said Milei's speech had "probably irked every single Falkland islander." Speaking from the capital Stanley, she added: "we have a burgeoning economy for a small place... we will remain forever British."
Analysts note that Milei's move carries a significant domestic political dimension. His approval rating has fallen to around 34%, and he faces a presidential election within a year. He also faces a challenge from his former vice-president, Victoria Villarruel, a pro-military politician who has criticised his handling of the sovereignty question. The sanctions announcement is seen in part as an effort to counter accusations that he has been weak on an issue central to Argentine national identity.
