Image: Replenishment tanker RFA Tideforce (A139) heading west down the Firth of Clyde, seen from Gourock. By Dave Souza – Own work, CC BY-SA 4.0, (Wikipedia)
British armed forces played a direct supporting role in the United States’ seizure of a Russian-flagged oil tanker in the North Atlantic, the Ministry of Defence has confirmed, marking a significant escalation in Western enforcement of sanctions linked to Venezuela, Iran, and Russia.
The vessel Marinera, previously known as Bella 1, was intercepted by US forces on Wednesday as it travelled between Iceland and Scotland, apparently en route to a Russian Arctic port. British military assets, including RAF surveillance aircraft and the Royal Fleet Auxiliary supply ship RFA Tideforce, were involved in the operation, according to the MoD.
The tanker had been pursued by the United States for several weeks after allegedly breaching what President Donald Trump described as a “total naval blockade” imposed on Venezuela in December. US authorities say the ship was involved in sanctions evasion and had links to Iranian oil exports and Hezbollah-affiliated networks. Another Venezuela-linked tanker, the Sophia, was seized by US forces in a separate pre-dawn operation in the Caribbean on the same day.
British Defence Secretary John Healey said the operation demonstrated the depth of cooperation between London and Washington and formed part of wider global efforts to curb sanctions busting by so-called shadow fleets. He described the vessel as having a “nefarious history” and accused it of operating within a Russian Iranian axis that fuels conflict and instability from the Middle East to Ukraine.
The Ministry of Defence insisted that the UK’s involvement was carried out in full compliance with international law. Officials said the ship had initially sailed under a false flag and was assessed to have been involved in illegal activities prior to switching its registration to Russia late last year.
Russia strongly criticised the seizure. Its transport ministry said the Marinera had been granted a temporary permit to sail under the Russian flag on Christmas Eve and argued that no state has the right to use force against vessels duly registered under another jurisdiction, citing the UN Convention on the Law of the Sea. Kremlin adviser Andrei Fedorov warned ahead of the operation that any attempt to seize the ship could trigger a serious crisis in relations between Moscow and Washington.
US and British surveillance aircraft were observed tracking the tanker in recent days as it moved north through the Atlantic. Flight tracking data showed American special operations aircraft operating from northern Scotland and flying towards Iceland shortly before the seizure.
The incident has also exposed tensions within the NATO alliance. President Trump appeared to criticise US allies following the operation, suggesting that America was always present for NATO partners even when that support was not reciprocated, despite clear British involvement.
An emergency statement on the seizure is expected in the House of Commons, with Defence Secretary Healey set to brief MPs on the rapidly evolving situation. He is also expected to address questions on wider security issues, including potential UK troop deployments linked to Ukraine in the event of a ceasefire.
The seizure of the Marinera is likely to further strain already fragile relations between Russia and the West, adding a maritime flashpoint to a geopolitical landscape already shaped by sanctions, energy security, and military confrontation.