Overview
- British Royal Marine commandos and specially trained National Crime Agency officers boarded the Cameroon‑flagged tanker Smyrtos in the English Channel during a six‑hour operation on Sunday supported by Royal Navy ships and RAF and Maritime Air Group aircraft.
- The Smyrtos remains anchored off Weymouth under a Transport Secretary detention order that bars it from leaving UK waters while authorities monitor safety and environmental risks and pursue investigations.
- At least one crew member has been arrested on suspicion of sanctions offences and remaining crew are cooperating with investigators as inquiries continue into the vessel’s movements and ownership.
- The UK says the boarding used powers under international maritime law, citing UNCLOS Article 110, together with domestic sanctions and enforcement measures that Prime Minister Keir Starmer authorised in March.
- Officials framed the action as part of a wider push, carried out in coordination with France, to disrupt a 700‑plus ship ‘shadow fleet’ that uses flags of convenience, ship‑to‑ship transfers and spoofed tracking to evade sanctions and sustain Russian oil revenues.