Argentina Threatens Legal Action Against UK Over Falklands Oil Project
Argentine President Javier Milei has given Britain two weeks to halt the Sea Lion oil project near the disputed Falkland Islands. He has threatened legal action if the United Kingdom continues the offshore development. Argentina says the project violates international law and its claimed sovereign rights over the waters and resources around the islands, which Argentina calls the Malvinas.

The Falkland Islands remain under British administration, while Argentina continues to claim sovereignty over the territory. However, Britain rejects Argentina’s sovereignty claim and maintains its position over the islands. The two-week ultimatum has now placed the Sea Lion oil project at the centre of a renewed diplomatic and legal dispute between Buenos Aires and London.
Milei Gives UK Two Weeks to Halt Sea Lion Oil Work
Milei has given the UK two weeks to halt the Sea Lion oil project. He has also instructed Argentina’s Foreign Ministry and legal teams to prepare for arbitration under Annex VII of the United Nations Convention on the Law of the Sea. If Britain refuses, Argentina plans to seek provisional measures from the International Tribunal for the Law of the Sea in Hamburg. Argentina says the project violates international law and UN resolutions linked to the Falklands sovereignty dispute. In addition, Milei’s government has threatened action against companies exploring resources and proposed prison terms of up to 20 years for unauthorised extraction.
The Sea Lion oil field lies about 220 kilometres, or 137 miles, from the Falkland Islands. Israel’s Navitas Petroleum and Britain’s Rockhopper Exploration are developing the project under licences they say are valid. The partners reached a final investment decision earlier this year. Navitas is targeting first oil in March 2028, with production expected to continue for more than 30 years.The ultimatum has pushed the Sea Lion project into a new legal dispute between Argentina and the UK.
UK Defends Falklands Islanders’ Rights as Oil Project Advances
Britain has defended the Falkland Islanders’ right to determine their political future and develop their natural resources. The sovereignty dispute has lasted for decades and led to a 10-week war in 1982. The conflict killed 255 British and 649 Argentine troops. In a 2013 referendum, 99.8% of voters backed remaining a British Overseas Territory, although Argentina has rejected the result.
The legal dispute could add another layer of uncertainty to the Sea Lion project. The International Tribunal for the Law of the Sea can issue provisional measures, although enforcement presents a separate challenge. Previous cases have also raised questions about the tribunal’s jurisdiction when sovereignty issues are involved. Meanwhile, Milei has continued to press Argentina’s claim, including at the UN General Assembly. With Sea Lion moving toward its planned 2028 production date, the latest ultimatum has brought the long-running Falklands dispute into sharper focus.
Web Resources On Argentina Threatens UK Over Falklands Oil Project
1. BBC : Argentina threatens legal action against UK over Falkland Islands oil exploration.
2. AP News : Argentina’s President Milei threatens international legal action over Falklands oilfield.
3. AcademicBlock : Trump Signals Review of US Policy on Falkland Islands.
4. Independent : Argentina issues new deadline to UK over Falkland Islands.