Britain on Thursday announced sanctions targeting 38 Russian energy companies, shadow fleet oil tankers and financial networks that allegedly fuel Russia’s war effort.

“The message is simple: if you help Russia fund or equip this war, you will face the consequences,” the Foreign Office said in a statement.

London added 17 entities and individuals supplying high-priority goods to Russia, including importers of machine tools and electronics key to the country’s ballistic missile and drone capabilities.

One of the sanctioned individuals is Dutch national Alexander Jan Hendrik Tattersall, who is allegedly associated with the sanctioned Turkish trader Redwing Metal.

Britain sanctioned two Russian energy producers, saying the restrictions now cover more than 90% of Russia’s total oil production capacity.

An additional 12 tankers were also sanctioned, expanding the total number of targeted shadow fleet vessels to more than 600.

Targeting Russia’s alternative payment systems and crypto exchanges used to bypass Western sanctions, Britain designated five financial entities, including one registered in Canada and three in Kyrgyzstan.

The financial measures follow the U.S. Treasury’s recent crackdown on Russia’s A7 shadow banking network, which the U.S. claimed to have processed through sub-agents more than $17 billion in global transactions between January 2025 and June 2026.

The Foreign Office claimed two of the newly sanctioned payment platforms directly facilitated transactions for the A7 platform.