The United Kingdom has announced its most significant sanctions package against Russia since the full-scale invasion began in 2022. Timed to mark the four-year anniversary of the war, these measures are designed to aggressively cut off the revenue streams that Russia uses to fund its military efforts.

The UK is targeting Transneft, the massive state-owned company responsible for transporting over 80% of Russia’s oil exports.

To stop Russia from skirting global rules, the UK is sanctioning 175 companies within the “2Rivers” oil network—a major trader of Russian crude—and 48 oil tankers that make up part of Russia’s hidden shipping fleet.

The package includes sanctions on 3 civil nuclear energy companies and 6 LNG (liquefied natural gas) assets, including major export terminals like Portovaya and Vysotsk.

The sanctions also hit suppliers providing key equipment and components for Russian drones and weaponry.

Beyond the sanctions, the UK is also providing over £25 million (about €28.6 million) to help repair Ukrainian energy infrastructure that has been damaged by Russian attacks.