Argentina has threatened a British oil executive with imprisonment over drilling off the Falkland Islands, according to a witness statement submitted to the International Tribunal for the Law of the Sea (ITLOS) by the United Kingdom. Sam Moody, chief executive of Rockhopper Exploration, said he received correspondence from Argentina in September threatening criminal prosecution, imprisonment and fines under Argentine domestic legislation.
The disclosure was made in a witness statement submitted before two days of hearings at ITLOS in Hamburg this week, where Argentina is seeking an urgent suspension of drilling. Buenos Aires argues that Britain's agreement to drilling is illegal because the sovereignty of the Falkland Islands, known as the Malvinas in Argentina, is disputed between the two countries. Argentina cites a 1976 UN resolution calling for both sides to refrain from acting unilaterally to modify the situation.
In his statement to the tribunal, Moody said he was “taking some personal risk” by preparing the statement because he had “repeatedly been under threat of criminal prosecution and a custodial sentence in Argentina.” The executive also detailed other measures taken by Buenos Aires, including a 20-year ban on the Israeli partner Navitas from operating in Argentina. The submission also claimed that Argentinian officials wrote to Standard Chartered bank, urging it to refrain from participating in oil and gas development in the Falkland Islands. The names of contractors have been withheld from court documents for fear of Argentinian retribution, according to Ian Ramsay, chief executive of Navitas Petroleum Development and Production. US firm Halliburton recently said it would not conduct any work on the Sea Lion project after discussions with Argentina.
The UK argued that the tribunal does not have jurisdiction in the dispute and that the UN resolution is not legally binding. Ellie Reeves, the attorney general for England and Wales, told the tribunal that suspending the project would be terminal to its hopes of success with "devastating consequences" for the people on the islands. The Sea Lion project is expected to double the island's GDP, providing an £8bn uplift in revenues for the Falkland government over the oilfield's active lifetime. Jack Ford, a member and current chair of the Falkland Islands' legislative assembly, said the collapse of the project would be "not just economic but also social, and felt across the whole of the Falkland Islands."
Argentina's president, Javier Milei, told the UN General Assembly in September that reclaiming sovereignty of the Falklands was a national cause and that Buenos Aires was taking “matters into our own hands” through peaceful means. Argentina invaded the Falklands in 1982, leading to a 74-day war that ended with the surrender of Argentinian forces and cost the lives of 649 Argentinian military personnel, 255 British military personnel and three Falkland islanders.
A ruling by ITLOS on Argentina's application is expected on 28 November.
Analysis
Why This Matters
- The ITLOS ruling could set a precedent for whether international law restricts resource development in disputed territories.
- The Falklands economy depends heavily on the Sea Lion project; its suspension would have severe social and economic impacts on the islands.
- The case escalates tensions between the UK and Argentina over sovereignty, with Argentina using legal and economic pressure to assert its claim.
Background
The Falkland Islands have been under British control since 1833, though Argentina claims sovereignty. In 1982, Argentina invaded the islands, leading to a 74-day war that ended with British victory. The UN has called for negotiations but no settlement has been reached. Argentina has increasingly used diplomatic and legal measures, including domestic legislation criminalizing oil exploration without its permission, to press its claim.
Key Perspectives
Sam Moody (Rockhopper Exploration CEO): said he received a letter threatening criminal prosecution, imprisonment and fines under Argentine law, and that he was "taking some personal risk" by preparing his tribunal statement.
UK Attorney General Ellie Reeves: argued the tribunal lacks jurisdiction and that suspending the project would have "devastating consequences" for Falklands residents.
Argentine President Javier Milei: told the UN General Assembly that reclaiming sovereignty was a national cause and that Buenos Aires was taking "matters into our own hands" through peaceful means.
Jack Ford (Falkland Islands legislative assembly chair): said the collapse of the Sea Lion project would be "not just economic but also social, and felt across the whole of the Falkland Islands."
What to Watch
- The ITLOS ruling on 28 November on whether to order a suspension of drilling.
- Argentina's next steps if the tribunal does not rule in its favour; it may escalate diplomatic or economic measures.
- Whether other contractors follow Halliburton in withdrawing from the project, which could further complicate financing for Sea Lion.
Checked
12 claims in this story checked against 1 source: 12 supported.
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- SupportedArgentina threatened Sam Moody, Rockhopper Exploration’s chief executive, with criminal prosecution, imprisonment and fines over the oil project.UK news | The Guardian: ““As recently as 1 September 2026, Argentina wrote to me and Rockhopper’s chief financial officer personally threatening us with criminal prosecution, imprisonment and fines under its domestic legislation,” Moody said.”
- SupportedMoody said he was “taking some personal risk” in preparing his statement because he had repeatedly faced threats of prosecution and imprisonment in Argentina.UK news | The Guardian: ““I also want the tribunal to be aware that I, in common with others, [am] taking some personal risk by preparing the statement as I have repeatedly been under threat of criminal prosecution and a custodial sentence in Argentina,” he wrote.”
- SupportedThe disclosure was in a witness statement submitted by the UK to ITLOS before two days of hearings held that week.UK news | The Guardian: “The disclosure was made in a witness statement submitted by the UK to the international tribunal for the law of the sea (Itlos) before two days of hearings that were held this week.”
- SupportedArgentina is seeking an urgent suspension of drilling at the Sea Lion project.UK news | The Guardian: “Argentina is seeking an order from Itlos for the urgent suspension of drilling at the Sea Lion offshore oil project”
- SupportedArgentina argues that Britain’s agreement to drilling is illegal because the Falkland Islands’ sovereignty is disputed between the two countries.UK news | The Guardian: “Argentina’s application for suspension of the Sea Lion project is based on the claim that Britain’s agreement to drilling is illegal as the sovereignty of the Falkland Islands is a matter of dispute between the UK and Argentina.”
- SupportedArgentina cited a 1976 UN resolution calling on the two countries to refrain from unilateral action to modify the situation in the Falklands.UK news | The Guardian: “In 1976, a UN resolution called for the two countries to settle their rival sovereignty claims and to refrain from acting unilaterally to modify the situation in the Falklands.”
- SupportedArgentina banned Navitas from operating in the country for 20 years.UK news | The Guardian: “They included Argentina banning Navitas from operating in the country for 20 years.”
- SupportedArgentinian officials urged Standard Chartered to refrain from participating in oil and gas development in the Falkland Islands.UK news | The Guardian: “It is also claimed that Argentinian officials wrote to Standard Chartered bank, which has a branch in Port Stanley, the capital on the Falklands, urging it to “refrain from participating in oil and gas development in the Falkland Islands to avoid falling within the terms of certain Argentine domestic legislation”.”
- SupportedThe UK argued that ITLOS lacked jurisdiction and that the UN resolution was not legally binding.UK news | The Guardian: “In response, the UK claimed this week that the tribunal did not have jurisdiction in the dispute and that the UN resolution cited was not legally binding.”
- SupportedEllie Reeves told the tribunal that suspending the project would be terminal to its hopes of success, with “devastating consequences” for islanders.UK news | The Guardian: “Ellie Reeves, the attorney general for England and Wales, further told the tribunal that the oil project’s suspension would be terminal to its hopes of success with “devastating consequences” for the people on the islands.”
- SupportedThe Sea Lion project is expected to double the island’s GDP and provide an £8bn uplift in Falkland government revenues over the oilfield’s active lifetime.UK news | The Guardian: “The Sea Lion project is expected to double the island’s GDP, providing an £8bn uplift in revenues of the Falkland government over the oilfield’s active lifetime.”
- SupportedA ruling by ITLOS on Argentina’s application is expected on 28 November.UK news | The Guardian: “A ruling by Itlos on Argentina’s application is expected on 28 November.”