NATO reinforcement needs behind the Sea Harrier

Cold War plans required the Royal Navy to move 3 Commando Brigade and other reinforcements to Norway. The reinforcement group needed its own layers of air defence and threat identification at sea. NATO calculations showed that RAF cover from Scotland could not meet the requirement with the money and equipment available. That exposed a gap in British planning during alliance meetings and made the small Invincible-class carriers and Sea Harrier operationally necessary. Carrier aviation followed from a specific reinforcement plan and pressure inside NATO, beyond general institutional advocacy.