Reports have surfaced suggesting that two alleged Russian spies discreetly infiltrated the United Kingdom by boarding cargo ships, subsequently positioning themselves near significant military installations and vital government infrastructure.

According to the i Paper, these individuals arrived in the U.K. during the spring and summer of 2025, docking at ports located in Torquay, Middlesbrough, and Grangemouth in the northeast of the country. Their arrival has raised alarms due to their proximity to key areas of national security.

Sources from the U.K. defense sector have indicated that the men might be connected to military and intelligence operations under the command of President Vladimir Putin. This assertion further intensifies the concerns regarding their motives and potential activities within the U.K.

It is believed that the duo managed to slip into the country by capitalizing on commercial shipping routes, thereby bypassing the more rigorously monitored border entry points. This method allowed them to enter undetected, avoiding the usual scrutiny associated with more conventional entry routes.

Interestingly, the vessels they traveled on were not flagged under Russia nor were they part of the Kremlin’s sanctioned shadow fleet. This strategic choice made their movements notably less conspicuous, underscoring the sophistication of their operation.

The ships they used were reportedly neither Russian-flagged nor part of the sanctioned shadow fleet associated with the Kremlin, making them far less likely to attract scrutiny.

A senior NATO official responsible for protecting Europe’s maritime waters told the outlet that intelligence agencies had detected Russian operatives traveling on non-suspicious cargo vessels.

The official said those types of ships offer an ideal way of moving personnel discreetly.

Putin is testing the boundaries of NATO with aircraft incursions, allied states say. (Ramil Sitdikov/Pool/Reuters )

“It would be the most natural place to move people around in that world, and we think it’s going on,” the source said.

“They are not sailing on shadow fleet tankers, they are sailing on all [types of] ships,” the source claimed, adding that Russian agents had monitored and “tested European ports to find weaknesses.”

One of the suspected operatives is reported to have entered the U.K. through Torquay in the South West after traveling from Finland. 

The second, previously seen in Moscow at an intelligence-linked facility, was suspected of traveling from Kaliningrad and entering via Middlesbrough and Grangemouth.

After spending time around the storage facility at Grangemouth, the second operative also traveled to Falkirk, where they visited a retail park.

Suspected Russian operatives entered the U.K. through ports near weapon facilities to test security weaknesses. (John Keeble/Getty Images)

Both British docks were recently proposed by the Ministry of Defense as potential sites for future U.K. weapons factories. 

They are currently unused brownfield locations, increasing concerns over the security implications of the alleged visits.

Elisabeth Braw of the Intelligence Council and senior fellow at the Atlantic Council told the i Paper that it makes sense for Russian intelligence to exploit these weaknesses.

“It doesn’t surprise me that Russia wants to bring certain people into the country even though they can reach people who are already there,” she said.

“They need their own operatives to conduct this sort of activity,” Braw added.