Britain and Nato have launched their biggest war games on Russia’s doorstep amid growing tensions over Vladimir Putin’s military aggression. The largest ever Nato anti-submarine exercise, including the Royal Navy, is under way off the coast of Norway just weeks after reports of Russian submarines encroaching in to foreign waters. At the same time British troops are taking part in the biggest military exercise seen in Estonia since the Baltic nation regained its independence more than two decades ago.

The war games come as tensions grow with Russia over Ukraine crisis and fears that the Baltic nations could be next in President Putin’s sights.The commander of the Nato manoeuvres said recent incidents by the Russian military were a “cause of concern” and added “relevance to the exercise”.At least 18 ships and submarines are taking part in Operation Dynamic Mongoose which involves 10 Nato members and Sweden. The submarines will take turns trying to approach and target the ships, including HMS Portland, undetected to simulate an attack in one of the world’s most hostile sea areas. MORE