Multiple reports describe the seizure of a Russian tanker connected to President Vladimir Putin’s so-called “shadow fleet” in a British-led operation. The vessel is reported to be anchored off the Dorset coast, and the incident is described as the first operation of its kind led by Britain. The coverage states that Royal Marines carry out the action and that it occurs shortly before Prime Minister Keir Starmer is scheduled to discuss related developments at the Group of Seven (G7). The “shadow fleet” refers to a fleet of ships widely described as operating in ways meant to circumvent international sanctions, typically by providing shipping services for sanctioned entities or by avoiding standard compliance measures. While the reports emphasize the location and timing of the seizure and frame it as part of wider enforcement efforts, they do not, in the provided text, add details about the tanker’s name, the specific circumstances of the boarding, or the legal basis and follow-up steps. Overall, the sources agree on the key facts that a Russian-linked tanker is seized near Dorset and that it is presented as an early example of British-led maritime action tied to sanction enforcement.