UK’s Shadow Fleet Challenge: Sanctioned Russian Tankers Continue Through British Waters

In January 2024 the United Kingdom tightened its legal framework to allow detention of sanctioned Russian vessels near its coast. On 25 March Prime Minister Sir Keir Starmer authorised forced boardings of ships sailing under false flags. GCHQ Director Anne Keast-Butler warned of a “new era of radical uncertainty” and hybrid activity. The Ministry of Defence says it is disrupting maritime activity. Russian warships escort tankers, and Starboard Maritime Intelligence tracks their passages.

iNews

Since the new powers, 205 sanctioned Russian tankers have crossed the UK’s 200-mile EEZ, with 84 entering territorial waters. On a recent Thursday six shadow-fleet tankers passed the English Channel. The Ministry of Defence says over 700 shadow-fleet vessels with unknown insurance have been challenged, and roughly 75 % of Russia’s crude oil moves via this fleet.

iNews

Prime Minister Starmer said the United Kingdom is targeting vessels that use false flags to evade sanctions. The Ministry of Defence described its actions as disrupting maritime activity. GCHQ Director Keast-Butler warned of a new era of radical uncertainty and hybrid activity that stretches from the seabed to cyberspace. A MoD spokesperson declined to comment on specific operational plans.

iNews

A UK intelligence source said educating the public is essential because citizens pose the biggest security risk. NATO futures fellow James Park argued that the UK’s determination matters more than the number of tankers, noting that a few seizures would send a strong signal to Moscow. European allies—Belgium, France, Sweden, Finland—have carried out forced boardings, and the United States seized the Bella-1 tanker earlier this year.

iNews

The UK has not seized any vessel, reflecting legal caution and the need for senior sign-off. European partners and the United States have conducted boardings, exposing a gap between policy intent and operational capability. Legal thresholds for interdiction remain unclear.

iNews

• “We are entering a new era of radical uncertainty, a space between peace and war.” — Anne Keast-Butler, Director, GCHQ

iNews

• “Educating the public, who continue to pose the biggest risk to UK national security, is more important.” — Unnamed UK intelligence source

iNews

• “The question of how many tankers were passing matters less than ‘how determined’ the UK is to seize them.” — James Park, Futures Fellow, NATO

iNews

• “We will not comment on specific operational planning or give a running commentary as this could compromise our ability to successfully take action against these ships, only benefitting our adversaries.” — Ministry of Defence spokesperson

iNews

British naval units and Special Forces stand ready, but any seizure requires senior sign-off. Ongoing monitoring of the shadow fleet, combined with allied pressure, may drive the UK toward active interdiction in the coming months.

iNews