Why UK Is Letting Sanctioned Russian Oil Tankers Pass Through the Channel

The United Kingdom has yet to detain a single sanctioned Russian oil tanker, with officials citing the high financial burden of maintaining seized vessels as a key obstacle, according to reporting by The Times on April 19.

Costs associated with docking, securing, and servicing such ships can run into tens of millions of pounds, effectively slowing down efforts to implement Prime Minister Keir Starmer’s plan to crack down on Russia’s so-called “shadow fleet.”

As British authorities continue to work out legal and operational procedures, sanctioned Russian tankers have continued to transit the English Channel—in some cases escorted by Russian naval vessels.

For now, the UK’s role in countering these operations remains limited. British agencies are primarily supporting broader international efforts led by the United States and France, providing intelligence and logistical assistance rather than directly intervening, The Times wrote.

Officials pointed to Ireland’s 2023 seizure of the MV Matthew as a cautionary example. The vessel’s upkeep and security have already cost more than $12 million, highlighting the long-term financial commitments involved in such actions.

According to The Times, additional concerns have also emerged within the UK government over the potential for asylum claims from Russian crew members, including individuals linked to private military formations, which could further complicate any detention process.

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Taken together, the financial, legal, and political risks have contributed to a cautious approach, even as sanctioned Russian oil shipments continue to move through one of Europe’s busiest maritime corridors.

Previously, Russia conducted a covert submarine operation in waters near the United Kingdom that posed a potential threat to critical energy pipelines and data cables.

British and allied forces tracked a Russian Akula-class attack submarine along with two specialized deep-sea submarines linked to Moscow’s GUGI program  for more than a month in the North Sea before the vessels withdrew.

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