A Cameroon-flagged oil tanker under UK sanctions for transporting Russian crude has navigated through the English Channel without intervention, despite recent government authorization for military boarding operations. The VAYU 1, carrying a full cargo from Murmansk, Russia, entered UK territorial waters on March 26th, passing within six nautical miles of Dover according to maritime tracking data.
This transit occurred just one day after British ministers publicly declared that armed forces had received permission to board sanctioned vessels in UK waters. The government had added VAYU 1 to its sanctions list in May 2025 for allegedly carrying Russian oil and “destabilizing Ukraine.”
When questioned by BBC Verify about the non-intervention, the Ministry of Defence stated that “any enforcement action is considered on a case‑by‑case basis” in accordance with international law, declining to provide specific operational details that might compromise future enforcement actions.
Maritime analysis reveals the tanker spent approximately 5.5 hours within UK territorial waters (extending 12 nautical miles from shore) and 29 hours within the UK’s Exclusive Economic Zone (extending 200 nautical miles). Its final destination remains unlisted on tracking platforms.
The vessel represents part of Russia’s alleged “shadow fleet” of tankers with opaque ownership structures designed to circumvent international sanctions. Prime Minister Keir Starmer recently emphasized intensified efforts to target this fleet, stating: “Putin is rubbing his hands at the war in the Middle East because he thinks higher oil prices will let him line his pockets.”
Naval enforcement expert Professor Kevin Rowlands, a former Royal Navy captain, detailed potential detention procedures involving helicopter deployments and specialized boarding teams comprising sailors and Royal Marines trained to safely search vessels and divert them to UK ports when necessary.