This increases UK/Nato manpower available for Arctic operations and shortens reinforcement timelines for High North contingencies by keeping more forces forward-based in Norway. The three-year ramp creates a planning window for basing, logistics, and host-nation support capacity (housing, training areas, prepositioned equipment) that will affect allied exercise and readiness schedules. The March participation of 1,500 Royal Marine Commandos in Nato’s Exercise Cold Response signals near-term operational tempo and resource allocation toward Arctic readiness.