British Prime Minister Andy Burnham raised concerns about Argentina’s efforts to block a UK-Israeli oil exploration project near the Falkland Islands during a call with US President Donald Trump on Friday. The discussion centered on the “economic consequences” of Argentina’s recent actions regarding the disputed territory.

Argentina requested last week that the International Tribunal for the Law of the Sea (ITLOS) intervene to halt the joint hydrocarbon project, known as Sea Lion, located off the coast of the Falkland Islands. This move marks the latest development in the long-standing sovereignty dispute between the two countries.

The Falklands, administered by the United Kingdom, were the subject of a brief but intense war between Britain and Argentina in 1982. Despite Argentina’s military campaign, the islands have remained under British control since then. In 2013, the Falkland Islanders voted overwhelmingly to maintain their status as a British Overseas Territory. However, Argentina maintains its claim to the islands, which it refers to as Las Malvinas, disputing the legitimacy of the self-determination principle because it views the islanders as descendants of British settlers established after 1833.

Argentine President Javier Milei has intensified his country’s claim over the Falklands following comments from Trump suggesting a potential reassessment of the U.S. position on the dispute. Meanwhile, the UK government has affirmed that the islands will remain British and emphasized the right of the Falkland Islanders to explore and develop their natural resources independently.

Downing Street’s statement on the call noted that Burnham “raised the economic consequences of Argentina’s coercive measures for the UK and US” and underscored “the importance of respecting the islanders’ right to develop their natural resources.” The UK Prime Minister’s office did not provide specific details about the economic impact referenced.

From Argentina’s perspective, the appeal to ITLOS aims to protect its sovereign rights and prevent unauthorized activities that could worsen the dispute, as outlined in a presidential statement. The Argentine government contends that the United Kingdom’s unilateral authorization of the exploration project exacerbates a conflict recognized by the United Nations.

The ongoing disagreement highlights the complex geopolitical tensions surrounding the Falkland Islands and the challenges in balancing territorial claims with international legal frameworks and the rights of the island inhabitants.