Question to the Foreign, Commonwealth & Development Office:

To ask His Majesty's Government what estimate they have made of the number of tankers owned by individuals outside Russia which are acting as part of the shadow fleet by transporting sanction-breaking oil shipments.

The UK has now sanctioned 545 ships under its Russia sanctions regulations. Russian oil cargoes carried on ships specified by the UK in the first half of 2025 dropped off by an estimated 28 per cent and were worth approximately $4.5 billion less, comparing prior cargoes to the three months post-specification. Establishing a shadow fleet, including replacing capacity lost to UK and partner sanctions has cost Russia at least $14 billion. Russia's oil export revenues are now at their lowest since Russia's full-scale invasion of Ukraine in February 2022. At the start of last month (December 2025), nearly 180 million barrels of Russian oil were sitting in tankers undelivered - up 28 per cent since August 2025.