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County-class destroyer
The County class was a class of guided missile destroyer, the first such vessels built by the Royal Navy. Designed specifically around the Sea Slug anti-aircraft missile system, the primary role of these ships was area air-defence around the aircraft carrier task force in the nuclear-war environment.
The class was designed as a hybrid cruiser-destroyer, with a much larger displacement (similar to that of the ''Dido''-class cruiser) than its predecessor, the ''Daring'' class. During the final design period in 1956 - 1958 a full gun armament was envisaged,〔N. Hall. "County Class Missile Destroyers". ''Ships Monthly'', May 2008, pp 48-51.〕 based on a modern combined gas turbine and steam turbine ('COSAG') propulsion unit, as enlarged ''Daring'' fleet escorts, armed with 2 twin Mk 6 4.5, 2 twin L/70 40mm and a twin 3 inch/70. Only as late as 1958 was the decision made to fit the ships with guided missiles〔J. Wise. "Girdle Ness. Seaslug Missile Trials". ''Warship 2007'', pp19-21.〕 on the insistence of the First Sea Lord, Admiral Mountbatten〔A.Preston. ''Warships of the World''. Jane's. London (1980), p103〕 and the Cabinet, despite staff reports over missile unreliability and inaccuracy,〔Wise. "Girdle Ness". ''Warship 2007'', pp19-21〕 and the vulnerability of the above-waterline missile magazine. Lord Mountbatten believed that describing the County class as destroyers rather than cruisers, and demonstrating the apparently impressive performance of Sea Slug on the missile range against Gloster Meteor UC15 drones, he could justify a modern Royal Navy and a large number of County class 'destroyers'.〔B.Wilson. ''Empire of the Deep''. Weidenfeld & Nicolson. London (2013) pp624-5〕 While short on the support and logistic spares stocks of a traditional cruiser, they were still envisaged by the DNC as being 'probably' used in the cruiser role〔N. Hall. ''Ships Monthly'' May 2008, p48〕 with space for Flag staff offices, and admiral's barge accommodation〔Friedman N. ''British Destroyers and Frigates: The Second World War and After''. Seaforth UK, (2012)〕 in the 1960s: the last decade when the UK oversaw significant colonial territory ("East of Suez"). Its missile capability had been overtaken by aircraft development by 1962–63, when HMS ''Devonshire'' and ''Hampshire'' entered service, but in the early and mid-1960s the modern lines of these guided-missile destroyers, with their traditional RN cruiser style and their impressive-looking missiles, enabled the overstretched Royal Navy to project sufficient power to close down the threat of a militant, left-leaning Indonesia to Malaysia and Borneo during the Indonesia-Malaysia confrontation.〔N. van der Bijl. ''Confrontation. The War with Indonesia 1962–66''. Pen & Sword (2007) UK, pp 134–5, 139〕
==Ships of the class==
Eight vessels were built in two batches between 1959 and 1970, the later four vessels carrying the improved Sea Slug GWS2 and updated electronics requiring rearranged mastheads. The major identifying feature was the Batch 2 vessels' prominent "double-bedstead" AKE-2 antennas of the Type 965 air-search radar, and their taller foremast carrying the Type 992Q low-angle search radar.
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