For most of the Cold War, the Royal Navy’s central wartime mission was to hold the line across the Greenland-Iceland-UK gap against the Soviet Northern Fleet, while the Royal Marines trained each winter in northern Norway to defend NATO’s northern flank. After 1991, the threat shifted toward the Gulf, the Balkans, and Afghanistan, and cold-weather skills and steady presence thinned out.

But the reason the region remains strategically vital hasn’t changed. Russia’s Northern Fleet, based on the Kola Peninsula and home to submarines carrying much of Russia’s sea-based nuclear deterrent as well as its best attack boats, operates in a geography where any Russian movement toward the Atlantic must pass through the “Bear Gap” between northern Norway and Svalbard and then through the wider Greenland-Iceland-UK gap.

That makes the High North more than a remote theatre. It is the corridor that shapes how forces and influence can move, and it affects national security through the ability to monitor and respond early if deterrence fails. The article argues that the UK’s repeated activity there reflects a return to familiar tasks—especially because restoring these hard-won operational skills cannot be done quickly once they lapse.

Beyond headline deployments, the Royal Navy and UK armed forces maintain a year-round presence that is largely unseen by the public. The article points to standing winter forward positions for UK commandos and to long-running training activities that build real-world readiness in extreme cold and harsh sea conditions.

Exercises in northern Europe and the Arctic serve two purposes: demonstrating NATO interoperability and rehearsing the kinds of reconnaissance and raids that would be required in a crisis. The value is not only doctrine on paper, but learning what troops and equipment can actually sustain in temperatures that can drop far below freezing, as well as practicing how to operate in environments where conditions—like Arctic acoustics for submarine hunting—behave differently from anywhere else.