The UK government has been unable to seize Russian vessels operating within British waters despite earlier commitments to take stronger action against what has been described as a “shadow fleet” linked to Russia. The issue came to light during a recent parliamentary session, highlighting the limitations imposed by international maritime law.

In March, Prime Minister Sir Keir Starmer announced plans to intensify efforts against Russian ships passing through UK waters, including authorizing the British military to board these vessels. Since that announcement, 63 Russian ships have transited the area, averaging about one per day. However, no seizures have taken place.

Armed Forces Minister Al Carns disclosed to the security committee of Parliament that the government explored options to reinterpret the United Nations Convention on the Law of the Sea (UNCLOS) to broaden its authority to "interdict" Russian vessels. Ultimately, officials decided against extending legal interpretations due to concerns about the potential ramifications for international shipping and fears of facilitating piracy under an overly broad application of maritime law.

“We didn’t believe in stretching UNCLOS provisions – that’s including the piracy provisions – beyond proper limits,” Carns explained. He emphasized that the government retains the legal ability to intercept Russian ships provided their activities fall within defined parameters, though these remain narrowly construed under existing law.

Carns also acknowledged public expectations may contrast with the current operational realities. “I can understand that those looking at the numbers may think, ‘you said you’re going to do this, but you haven’t,’” he said, defending the government's position that legal and diplomatic constraints restrict more assertive measures.

The response drew sharp criticism from Shadow Defence Minister David Reed, who described the government’s position as a failure to implement meaningful defense policy. Reed stated, “In March, the Prime Minister stood up and made a big defence announcement. Now his own minister for the Armed Forces has confirmed it was worthless. This isn’t a defence policy – it’s deterrence in reverse.”

The situation underscores the complexity of enforcing national security measures within the framework of international maritime law, where efforts to curb Russian naval activities in British waters are constrained by legal provisions designed to protect global shipping and prevent escalations. The government’s cautious approach reflects a balancing act between asserting sovereignty and adhering to international obligations.