Two suspected Russian intelligence operatives are thought to have entered the UK on ordinary cargo ships before travelling to locations close to military bases and key infrastructure, The i Paper has reported.

The pair are said to have arrived earlier this year through ports at Torquay, Middlesbrough and Grangemouth. A UK defence source claimed the men, linked to Vladimir Putin ’s military and intelligence networks, managed to access Britain unnoticed by using commercial shipping routes rather than more heavily monitored entry points.

Experts believe the Agents chose ports to exploit “less rigorous” border checks.

Neither cargo vessel used was Russian-flagged, nor were they among the “shadow fleet” of sanctioned ships associated with the Kremlin. That clandestine network typically

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