Argentina has asked the International Tribunal for the Law of the Sea (Itlos) to order Britain to suspend oil drilling off the Falkland Islands, arguing the Sea Lion project breaches a UN resolution and deepens a sovereignty dispute that led to war in 1982.
At a two-day hearing in Hamburg, Argentina's chief legal adviser, Javier Oyarzábal, told the tribunal that the project, led by Israeli firm Navitas and its British partner Rockhopper, must be halted as a provisional measure. Oyarzábal said the 3,400 inhabitants of the Falkland Islands, whose status as a British overseas territory is disputed by Buenos Aires, had no right to the resources around the archipelago, which Argentina calls the Malvinas. "These resources belong to the Argentine people," he said, adding that Argentina respects the islanders' way of life but that they cannot decide which state the islands belong to.
Oyarzábal accused the UK of refusing to negotiate while exploiting natural resources in a way that would entrench the status quo, and claimed oil revenue would "finance the very military base and presence that sustains the UK's de facto control of the territory." He also warned that a blowout or spill would leave Argentina to bear the consequences, not a country 12,700 kilometres away.
The dispute over the Falklands led to war in 1982, costing 649 Argentine military personnel, 255 British military personnel and three Falkland Islanders their lives. The hearing is the first time substantive matters relating to the Falklands have been litigated at an international tribunal.
The Sea Lion project in the North Falkland basin has the potential to triple the islands' GDP per capita, according to the source. Fisheries catches on which the islanders depend are declining. A final investment decision was reached earlier this year, with first oil planned for March 2028, according to Navitas Petroleum.
Ellie Reeves, the UK's attorney general, attended the hearing and said Argentina was seeking to litigate sovereignty through Itlos, which she said she did not think was the forum to determine sovereignty. "We don't think this is the forum to effectively determine sovereignty issues," she said. Asked whether the UK would abide by any ruling, Reeves said: "We don't know what's going to happen in terms of the outcome but we don't consider they have jurisdiction on sovereignty issues. We respect the court and the institutions … but I don't want to get ahead of what the tribunal may or may not say."
UK Prime Minister Andy Burnham said in September his government would "always respect the rights of the Falkland Islanders to choose to be British." A spokesman said the UK was "fully engaged in the UNCLOS process" and that the hearing was "not about the sovereignty of the Falklands."
Princess Anne arrived in Port Stanley on Monday in a show of solidarity. The hearing continues.
Analysis
Why This Matters
- The tribunal's ruling on provisional measures could determine whether drilling proceeds next year, affecting the economic future of the Falkland Islands, which rely on declining fisheries.
- The case tests whether international maritime law can arbitrate a sovereignty dispute that the UK insists is outside its jurisdiction, setting a potential precedent for other contested maritime zones.
- A decision against the UK would escalate diplomatic tensions at a time when Argentina's President Javier Milei has already condemned the project as unlawful.
Background
The Falkland Islands have been under British control since 1833, but Argentina has long claimed them as part of its territory. The two countries fought a brief war in 1982 over the islands. The Sea Lion oil field is operated by Navitas Petroleum Development and Production Ltd, a UK-based subsidiary of Israeli Navitas Petroleum, alongside Rockhopper Exploration. A final investment decision was reached earlier this year, and first oil is planned for March 2028. Argentina applied to Itlos in October, arguing that Britain's approval breaches a 1976 UN resolution calling on both parties to avoid unilateral action until the sovereignty dispute is settled. Itlos is an independent judicial body established by the 1982 United Nations Convention on the Law of the Sea.
Key Perspectives
Argentina: The oil project is the "unilateral conduct" of a "colonial power" and must be suspended. Argentina is ready to negotiate all aspects of the Falklands question, including the "aggravation of the dispute caused by the UK." The resources belong to the Argentine people, and the islanders have no right to decide sovereignty.
United Kingdom: The tribunal is not the proper forum to determine sovereignty. The UK respects the rights of Falkland Islanders to choose to be British and will "robustly defend" its interests. The hearing is about provisional measures, not sovereignty.
What to Watch
- The tribunal's decision on Argentina's request for urgent provisional measures, including whether it orders the UK to stop drilling.
- Whether the UK agrees to abide by any ruling on jurisdiction, or whether the dispute escalates diplomatically.
- Any further unilateral actions by either side, such as Argentina imposing new restrictions or the UK beginning drilling as planned in March 2028.
Checked
12 claims in this story checked against 2 sources: 10 supported.
Show each claim
- SupportedArgentina has asked ITLOS to order Britain to suspend oil drilling off the Falkland Islands.Business | The Guardian: “Argentina is requesting urgent provisional measures, including a commitment from the UK to “stop the drilling””
- SupportedThe Hamburg hearing is the first time substantive matters relating to the Falklands have been litigated at an international tribunal.Business | The Guardian: “The hearing is the first time that substantive matters relating to the Falklands have been litigated at an international tribunal.”
- SupportedThe UK rejects ITLOS’s jurisdiction to decide sovereignty issues.Business | The Guardian: “We don’t consider they have jurisdiction on sovereignty issues.”
- Partly supportedArgentina argues that the Sea Lion project itself breaches a UN resolution.Business | The Guardian: “claiming Britain’s approval of the project is in breach of a 1976 UN resolution calling on both parties to desist from unilateral action on the islands until the sovereignty dispute is settled.”
- SupportedOyarzábal said, “These resources belong to the Argentine people.”Business | The Guardian: ““These resources belong to the Argentine people.”
- SupportedOyarzábal claimed oil revenue would “finance the very military base and presence that sustains the UK's de facto control of the territory.”Business | The Guardian: “Oyarzábal claimed that the oil money from the drilling would “finance the very military base and presence that sustains the UK’s de facto control of the territory”.”
- SupportedReeves said, “We don't think this is the forum to effectively determine sovereignty issues.”Business | The Guardian: “She said: “We don’t think this is the forum to effectively determine sovereignty issues.””
- SupportedOyarzábal warned that Argentina would bear the consequences of a blowout or spill, not a country 12,700 kilometres away.Business | The Guardian: “In the event of a blow out or spill, it is Argentina that would bear its consequences and be called upon to respond, not a state that is 12,700km away.”
- SupportedThe 1982 war cost the lives of 649 Argentine military personnel, 255 British military personnel and three Falkland Islanders.Business | The Guardian: “The long-standing dispute between Argentina and the UK over the sovereignty of the Falkland islands led to war in 1982 at the cost of the lives of 649 Argentine military personnel, 255 British military personnel and three Falkland Islanders.”
- Partly supportedThe final investment decision was reached earlier this year, according to Navitas Petroleum.Oilprice.com: “The companies earlier this year reached a final investment decision on the Sea Lion Northern Development. This means that all the necessary approvals and funding for full-scale project execution have been secured. First oil is planned for March 2028, Navitas Petroleum says.”
- SupportedThe Sea Lion project has the potential to triple the islands’ GDP per capita.Business | The Guardian: “The Sea Lion project in the North Falkland basin, led by the Israeli-firm Navitas and its British partner, Rockhopper, has the potential to triple the islands’ GDP per capita.”
- SupportedBurnham said in September that his government would “always respect the rights of the Falkland Islanders to choose to be British.”Oilprice.com: ““We will always respect the rights of the Falkland Islanders to choose to be British. That will never change under this Government, and we will be relentless in defending that,” UK Prime Minister Andy Burnham said in September”