Tensions rise between Argentina and the United Kingdom over the Falklands: the next steps in the oil dispute

Members of the Argentine Navy stand guard before the Monument to the Fallen in the Malvinas, dedicated to the Argentine soldiers who died in the 1982 war (Reuters)14,000 kilometers from the Falkland Islands, the Foreign Office in London, through parliamentary undersecretary Uma Kumaran, summoned Argentine ambassador Mariana Plaza this Wednesday and brought the dispute over South Atlantic oil to the heart of the bilateral relationship. The message was direct: President Javier Milei's decision to push for international arbitration to halt the Sea Lion oil project raises questions about Argentina's reliability as a partner of the United Kingdom. It is not just a legal rejection. It is a diplomatic warning. The response came hours after Buenos Aires notified London of the start of arbitration proceedings under Annex VII of the United Nations Convention on the Law of the Sea (UNCLOS), with a two-week deadline to halt the project or face a lawsuit before the International Tribunal for the Law of the Sea (ITLOS) in Hamburg. The diplomatic escalation coincided with an ocean policy seminar held in the city of Buenos Aires that brought together diplomats, military officials, academics, and provincial officials to debate the future of the South Atlantic. Planned as a technical forum, it ended as a demonstration that the Malvinas question runs through the political agenda. As officially reported, Kumaran described the Argentine decision to resort to the mechanism of the United Nations Convention on the Law of the Sea (UNCLOS) as "the latest attempt to undermine the rights and livelihoods of the people of the Falklands." Parliamentary Undersecretary Uma KumaranThe official went further and took the dispute to the level of the bilateral relationship: "Such behavior raises questions about Argentina's reliability as a partner of the United Kingdom," she said. London maintained that Buenos Aires' efforts to obstruct economic activity on the islands "are not the acts of responsible international engagement," but deliberate attempts to affect "the prosperity and economic security of a self-governing people." The British official reaffirmed that the islanders "have freely and democratically chosen their future" and that they have "every right to develop and manage their natural resources without intimidation, coercion, or interference from third parties." Simultaneously, there was an equally firm parliamentary reaction. MP Andrew Rosindell, one of the most active defenders of the islanders in the House of Commons, called for flatly rejecting the ultimatum. "The United Kingdom cannot be intimidated by foreign governments into sacrificing its people, its sovereignty, or its territory," he wrote on social media. Rosindell recalled that in the 2013 referendum, 99.8% of the island's inhabitants voted to remain under British sovereignty, and warned that London must not "repeat the capitulation of the Chagossians and betray the islanders." The clearest response from the companies involved also came this Wednesday. Rockhopper CEO Sam Moody reaffirmed in the semiannual report filed with the London Stock Exchange that "first oil remains targeted for the first quarter of 2028" and that the company enters the second half of the year "fully funded" until the start of production. Rockhopper raised USD 180 million through a share placement and another USD 20 million through an open offer that exceeded 118% of the available subscriptions. Foreign Minister Pablo QuirnoMoody described the Milei government's actions as a period of "increased media and political attention" with no impact on the schedule and praised the "continued and firm support" of the United Kingdom government and the island authorities. It is the company's first regulatory document that explicitly mentions the Argentine threats and formally rules out their effect on the project. The Sea Lion project is being developed about 220 kilometers north of the archipelago, in the North Malvinas Basin. Israel-based Navitas Petroleum controls 65% of the stake; Rockhopper retains the remaining 35%. Estimated reserves amount to 1.7 billion barrels. The first phase contemplates 11 wells and a floating platform with capacity of up to 55,000 barrels per day; later stages aim for 200,000 barrels per day by 2030. The Argentine ultimatum and the British diplomatic warning mark the highest point of a pressure campaign that has been escalating for weeks. On September 3, Milei used a national broadcast to warn that any company linked to the project would be excluded from operating in Argentina: "Those who operate in our islands behind the back of the Argentine Government will have to choose between an illegal gamble in a disputed territory and a profitable and secure operation in a sovereign country," he said. The implicit threat is access to Vaca Muerta, the Patagonian shale formation that produces more than 600,000 barrels per day. The next day, oil services companies Schlumberger (SLB), Halliburton, and Baker Hughes announced that they will not participate in hydrocarbon projects on the islands or in the surrounding maritime areas. Rockhopper's shares fell 6.3% in London and Navitas's lost more than 2% in Tel Aviv. Foreign Minister Pablo Quirno confirmed the sending of some 180 notifications to companies linked to oil on the islands. The Foreign Ministry filed at least three criminal complaints before Argentine courts against ten companies and their executives, and sent Congress a bill that contemplates prison sentences of up to 20 years for those who extract resources in the area without Argentine authorization, which began to be considered this Wednesday. The Sea Lion oil platform operates in the waters of the Atlantic Ocean near the Falkland Islands archipelagoOn September 16, federal judge Mariel Borruto, of the Tierra del Fuego court, issued an injunction ordering Navitas and Rockhopper to halt drilling until Argentine environmental authorities can rule, although she acknowledged in the text itself that compliance "depends on international cooperation and the conduct" of the companies. The two-week deadline set by Milei expires in mid-October. If the United Kingdom does not halt the project, Argentina has announced it will turn to the ITLOS in Hamburg to request provisional measures. The mechanism is provided for in UNCLOS: while the Annex VII arbitral tribunal is not constituted—a process that can take months—the ITLOS can issue emergency orders to protect the rights in dispute. Foreign Minister Quirno clarified that the arbitration is not intended to resolve the sovereignty dispute over the islands, but rather the unilateral exploitation of hydrocarbons. "It is the first time that Argentina has brought the Malvinas cause before an international tribunal with regard to the exploitation of hydrocarbons," he said. Argentina has traveled this path before: in 2012, when the frigate ARA Libertad was detained in the port of Tema, Ghana, Buenos Aires resorted to the same mechanism and the ITLOS unanimously ordered the ship's release in less than a month. However, the Malvinas case has an obstacle that the frigate case did not have: sovereignty over the territory is in dispute, and UNCLOS regulates maritime spaces, not territorial title. Moreover, when ratifying the treaty, Argentina declared that it does not accept the compulsory procedures for disputes over maritime delimitation and historic titles, an argument the United Kingdom could use as a defense. London has already maintained that Sea Lion's activities are carried out "in full compliance with international law, including UNCLOS." Fulvio Pompeo delivers the opening remarks during the Ocean Policy Seminar in the Autonomous City of Buenos Aires. (Photo provided by GCBA)In this context, the Ocean Policy Seminar was held this Wednesday at Government House in Buenos Aires, jointly organized by the Foreign Ministry, the city government, and the Federal Council for Foreign Relations and Cooperation (Coferrec), which brought together representatives of the Navy, the Naval Prefecture, the Naval Hydrographic Service, coastal provinces, port authorities, the productive sector, and academia. Among the speakers was Ambassador Javier Figueroa, coordinator of Ocean Policies and South Atlantic at the Foreign Ministry, who warned that the sovereignty dispute has consequences that extend beyond the disputed territory. "Having a sovereignty dispute over approximately 40% of our maritime spaces poses enormous challenges for us," he said. One of the most concrete, he indicated, is the so-called mile 201: a strip of the South Atlantic where between 400 and 500 fishing vessels operate per year without any regulatory framework, because Argentina cannot advance multilateral fisheries regulation mechanisms beyond mile 200 while the United Kingdom claims to be recognized as a coastal state. "That imposes certain restrictions on us in defining policies," he said. The diplomat, in turn, described an ocean agenda that goes beyond the Sea Lion dispute, such as the regulation of the continental shelf and the fight against illegal, unreported fishing. In parallel, he noted that Argentina maintains bilateral ocean dialogues with Brazil, Uruguay, Chile, Peru, and Ecuador, and negotiates joint statements to coordinate positions in international organizations. "I don't see why we can't achieve in the blue economy what we achieved in the nuclear industry," Figueroa said. "We have everything."Meanwhile, Fulvio Pompeo, secretary general and of International Relations of the Buenos Aires city government, opened the day with a direct reference to the dispute: "Our legitimate rights of sovereignty over the Malvinas Islands, South Georgia, South Sandwich Islands, and the surrounding maritime spaces are part of a consensus that runs through all of Argentine society." The official linked that position to the international recognition of the outer limit of the Argentine continental shelf, the product of decades of technical and diplomatic work that he described as "a true state policy."