Overview
- British Royal Marine commandos and National Crime Agency officers boarded the Cameroon‑flagged tanker SMYRTOS in a six‑hour operation on June 14, supported by Chinook, Merlin and Wildcat helicopters, an RAF P‑8 patrol plane, HMS Sutherland and HMS Ledbury.
- The vessel is being held at an anchorage off England’s south coast and is under environmental, safety and investigative monitoring while officers search crew, cabins and documents.
- Prime Minister Keir Starmer authorised such boardings in March and officials say the action relied on the UN Law of the Sea (Article 110) and UK ship‑sanctions and maritime enforcement powers.
- The operation was carried out in close coordination with French authorities and follows recent allied interdictions, building on a wider campaign that has sanctioned nearly 600 shadow‑fleet vessels and coincided with reported falls in Russian oil revenues.
- The Kremlin denounced the seizure as illegal, diplomatic tensions are likely to rise, and open questions remain about the ship’s crew, the cost and legal outcome of holding the tanker, and longer‑term enforcement measures at sea.