Russian Shadow Fleet Faces New Scrutiny After UK Seizure

In June, the British navy seized the oil tanker MV Smyrtos in the English Channel after the vessel was found sailing under an illegal Cameroonian flag that had been removed from that country's registry on May 26. The capture marked a turning point for Russia’s “shadow fleet” – a group of sanctioned tankers that have traditionally used false or flag-less registrations to evade sanctions. Following the seizure, the Kremlin began routing more vessels away from the Channel and increasing the visible presence of Russian warships escorting its commercial ships near UK waters.

iNews

Open-source tracking from the maritime-analysis platform Kpler shows that between June 1 and August 26 2026, 171 sanctioned vessels passed waters near the United Kingdom, traversing the North Sea, English Channel, north-eastern Atlantic, Norwegian Sea and the coasts of the Netherlands and Belgium. Of these, 145 passed through English waters and 46 entered the English Channel. After the Smyrtos incident, the number of ships bypassing the Channel more than doubled, while traffic exiting the Baltic Sea increased.

iNews

In the 30 days leading up to August 26, 60 sanctioned tankers were recorded in UK waters; none were flying false flags, and just over a third were Russian-flagged. The shadow fleet maintained a presence in the Channel for 82 days during the summer (75 days when the Smyrtos detention period is excluded), leaving only ten days without any shadow-fleet vessels.

iNews

Gonzalo Saiz, a research fellow at the Royal United Services Institute, described the capture as a “forced hand” that has pushed the fleet to avoid known choke points such as the English Channel and to rely more on Russian warship escorts.

iNews

Naval warfare specialist Dr Noel Foster noted that the shadow fleet continues to fund Russia’s war economy despite the heightened confrontation with the West, and that the shift toward sailing under the Russian flag reduces the legal grounds for boarding and seizure.

iNews

• “Speculating on intentionality is hazardous, of course, but what we can see is a clear trendline towards moving from false flags and flagless vessels – which are legal grounds for boarding, searching and potentially seizure – to proper flag registration [of Russian ships under Russian flags],” — Noel Foster, naval warfare expert

iNews

The move toward legitimate Russian flag registration removes a key legal vulnerability that allowed UK forces to board vessels flying false flags. However, analysts warn that flying the Russian flag carries its own risks: any incident such as an oil spill or breach of international maritime law could expose Moscow to fines and diplomatic repercussions. The increasing use of Russian warships as escorts also raises the likelihood of direct naval confrontations in European waters, underscoring the broader strategic tension between the Kremlin’s covert trade network and Western maritime enforcement.

iNews