UK Defense Minister Issues Stern Warning to Putin Over Secret Underwater Operation: Potential Repercussions Unveiled

In a stern warning to Russian President Vladimir Putin, U.K. Defense Minister John Healey announced on Thursday the potential “serious consequences” for any Russian interference in the North Sea. This statement followed the disclosure of a military operation aimed at deterring Russian activities in the region.

Healey addressed Putin directly, stating, “We are aware of your actions around our cables and pipelines. Any attempts to damage them will not be tolerated and will be met with serious repercussions.”

The defense minister detailed the operation, which involved the deployment of a Royal Navy frigate, a Royal Air Force patrol aircraft, and hundreds of personnel. Their mission was to deter three Russian submarines detected near underwater cables within the United Kingdom’s economic exclusion zone.

Delivering his remarks at 9 Downing Street in London on Thursday, April 9, 2026, Healey provided insights into the recent U.K. military activities. (Yui Mok/Pool Photo via AP)

One of the detected submarines was identified as a nuclear-powered Akula-class submarine. The other two were spy submarines from Russia’s Main Directorate of Deep Sea Research, known as GUGI. According to Healey, these submarines were under Putin’s direct orders “to engage in hybrid warfare activities against the UK” and its allies.

At least one of those allies, Norway, was involved in the deterrent operation, Healey revealed. Norway’s Defense Minister Tore O Sandvik confirmed the cooperation in a Thursday statement. 

“Norway has participated in a coordinated military operation with our allies to send a clear message: covert activities in our waters will not be tolerated,” Sandvik wrote.

The submarines left U.K. waters after a protracted period of monitoring from the U.K. and Norway, and there is no evidence of damage to any underwater infrastructure, Healey said. 

Fox News Digital has reached out to the U.K.’s Defense Department for more information. 

The Russian incursion marked the second time in less than six months that the U.K. detected Russian seacraft near its territorial waters. Healey announced a similar military operation in November after Russia deployed the spy ship Yantar to the North Sea in 2025.

Russian President Vladimir Putin holds a meeting to discuss the situation in Dagestan hit by severe flood via videoconference at the Novo-Ogaryovo state residence outside Moscow, Russia, Tuesday, April 7, 2026. (Alexander Kazakov, Sputnik, Kremlin Pool Photo via AP)

Healey also cited this year’s incident as an example of why the U.K. hasn’t sent troops to the Strait of Hormuz, the narrow waterway in the Persian Gulf key to global energy markets that Iran has choked off in recent weeks.

“I understand people questioning why all UK military assets and personnel have not been deployed to deal with it. But that is not in Britain’s national interest,” he said, later calling Russia “the primary threat to the UK and to NATO.” 

President Donald Trump has criticized NATO allies and the organization itself for not acceding to requests to help open the Strait of Hormuz. 

“NATO WASN’T THERE WHEN WE NEEDED THEM, AND THEY WON’T BE THERE IF WE NEED THEM AGAIN,” he wrote in a Thursday morning Truth Social post.

Russian personnel walk on the gangway to Russian Navy submarine RFS Petropavlosvsk-Kamchatskiy, which is currently on a port visit at Tanjung Priok Port in Jakarta, Indonesia, Tuesday, March 31, 2026 (AP Photo/Tatan Syuflana)

The U.K., while holding a planning meeting on how to reopen the Strait of Hormuz after the Iran War is over, initially refused to let the U.S. use a British air base to launch military strikes against Iran. 

British Prime Minister Keir Starmer eventually allowed the U.S. to launch “defensive strikes” from Royal Air Force bases after Trump slammed him as “not Winston Churchill.”

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