County

The County class was the Royal Navy's first class of guided-missile destroyers, developed around the Sea Slug air-defense missile. The ships were large by destroyer standards and were regarded by many officers as major surface combatants closer to cruisers in role and prestige. They were designed for carrier task-force air defense during the transition from gun fleets to missile fleets.

Sea Slug drove much of the County class design because the missile, magazine, and handling system were physically large. The ships paired missile armament with guns, helicopter facilities, and command spaces, but the missile system's size and limitations shaped the whole platform. The result was influential, though later Royal Navy destroyers moved toward more compact and capable missile systems.

County-class destroyers served the Royal Navy through the Cold War and some later went to foreign navies after British service. Their operational history captures a period when the Royal Navy still centered high-end surface escorts around carrier protection and area air defense. They also show the cost and complexity of first-generation naval missile systems.