”The UK has become the world’s biggest insurer of shipborne Russian oil, and that the Russian oil trade “remains highly reliant on vessels insured in the UK”, which have transported a third of Russia’s ocean-going energy exports (by volume) since sanctions were imposed at the end of 2022.”

https://www.newstatesman.com/the-weekend-report/2024/01/revealed-city-of-london-vladimir-putin-oil