LONDON - Britain on Thursday imposed sanctions on Russian oil producer Slavneft and a range of energy-related entities and vessels, saying it had become the first country to target all of Russia's ten largest oil producers, the Prime Minister's Office said.

Source: UK Government (Prime Minister's Office)

The UK has become the first country to sanction all ten of Russia's major oil producers as the Prime Minister ramps up pressure on the Kremlin, the government release said. The package includes shadow fleet vessels involved in the transport of Russian oil and LNG, major coal companies, and Rosneft's flagship Arctic oil and gas project LLC Vostok Oil, alongside Slavneft.

Source: UK Government (Prime Minister's Office)

Under the Foreign, Commonwealth and Development Office notice, Moscow-based PJSC Oil and Gas Company Slavneft is subject to an asset freeze, which bars dealings in its funds under UK jurisdiction, and to transport sanctions, under which a ship owned, controlled, chartered or operated by a designated company is barred from UK ports, can be detained and will be refused UK registration. Vostok Oil, Rosneft's Arctic venture, was also designated.

Source: FCDO / OFSI Sanctions Notice, Russia, 12 Nov 2026

Announced on the way to Dublin

Prime Minister Andy Burnham's office released the package as he headed to the European Political Community summit in Dublin, where leaders of around 50 countries were meeting after this week's US-mediated peace talks on Ukraine in Abu Dhabi, and where Ukraine was set to be the focus. Burnham was expected to urge leaders to ramp up pressure on Russian President Vladimir Putin to take the peace talks seriously, and said Britain's new sanctions were meant to turn the screws on Russia's oil revenues.

Source: UK Government (Prime Minister's Office)

The government said the move means the UK is targeting nearly every part of the energy revenue chain across the oil and gas sectors, including producers, trading networks, supply chains and vessels, to further constrain Russia's ability to generate revenue and finance its war in Ukraine. Britain had previously sanctioned major Russian energy companies including Transneft, Rosneft and Lukoil; Slavneft completes the top-ten list.

Source: UK Government (Prime Minister's Office)

What happens next is enforcement and response: whether the newly specified oil and LNG vessels are turned away or detained, whether other European governments follow Britain in completing their own top-ten coverage at or after the Dublin summit, and how Moscow answers a package London designed to land while peace talks - which have not produced a ceasefire - are under way.