Argentina files legal claim against UK over Falklands oil exploration

Argentina has started legal action at the International Tribunal for the Law of the Sea aimed at halting oil and gas exploration north of the Falkland Islands. Buenos Aires said the UK had authorised the activity illegally, according to BBC News. The claim follows Argentinian President Javier Milei's demand two weeks ago that the Sea Lion oilfield project be scrapped.

UK Foreign Office minister Uma Kumaran criticised what she called Argentina's escalating campaign against companies operating in the Falklands. She accused Buenos Aires of economic coercion against the islands' people and said the UK would do whatever it takes to support them, while announcing new protections for those businesses.

The Sea Lion oilfield lies about 130 miles from the Falkland Islands and is estimated to hold 1.7 billion barrels of oil. The Falkland Islands government extended exploration licences last month, and production is expected to begin in 2028, potentially generating major revenue for the territory's roughly 3,500 residents. Britain's Rockhopper Exploration and Israel's Navitas Petroleum have insisted their licences are valid and were issued by Britain.

Argentina argues that the marine environment of disputed maritime areas is protected under international law. Its application seeks to preserve Argentina's sovereign rights over its continental shelf and to stop activities it says were authorised unilaterally and illegally by the UK, according to BBC News. Argentinian Foreign Affairs Minister Pablo Quirno said on X that the government was asking the tribunal for orders against the UK, including a halt to new exploration permits.

The UK government maintains that Sea Lion is lawful, sits on the Falkland Islands shelf and is regulated by the islands' government. While the Falkland Islands government grants exploration licences, they must be signed off by the UK Foreign Secretary. Kumaran said the tribunal application does not invalidate licences issued by the Falkland Islands government, alter the islands' regulatory authority or require lawful hydrocarbon development to stop.

The tribunal is an independent judicial body based in Hamburg that applies the UN Convention on the Law of the Sea. UK officials have said Britain will engage with the tribunal but resist Argentina's claim firmly, and are introducing measures under the Protection of Trading Interests Act to shield firms from any extra-territorial impact of Argentine laws. Foreign Secretary Ed Miliband called Argentina's attempts to intimidate businesses engaged in legitimate commercial activity unacceptable. The dispute follows Milei's criticism of the UN at the General Assembly last month, which Kumaran described as inflammatory, and BBC News reported that UK officials believe Argentina's leadership is deliberately picking a fight ahead of elections next year.