twelve Jaguar GR1, again providing offensive support to NATO forces in West Germany. In addition to its conventional weapons, the squadron had eight WE.177 tactical nuclear bombs for use if a future European conflict escalated to the use of nuclear weapons. The apparent mismatch between eight nuclear bombs and twelve aircraft was because RAF staff planners expected up to one third attrition in the initial conventional phase, with sufficient aircraft held back in reserve to deliver the full stock of nuclear weapons to targets beyond the forward edge of the battlefield, deep into the enemy's rear areas. The squadron was assigned to NATO for operational and targeting purposes, although political control over release of the British-owned WE.177 weapons was retained by the British government in London. On 30 June 1984, 20 Squadron re-equipped with the Tornado GR1 at RAF Laarbruch, retaining its offensive support role and increasing its stock of WE.177 nuclear weapons to 18, due to the Tornado's greater payload. In November 1990, the squadron deployed to RSAF Tabuk, Saudi Arabia, as part of the RAF's contribution to Operation Granby, the British name for its part in the Gulf War of 1991. The squadron was responsible for attacks on Iraqi airfields at low- and medium-levels, and also introduced the new ALARM anti-radiation missile into operational service. 20 Squadron returned to RAF Laarbruch in March 1991. As part of the British Government's Options for Change Defence Review, the RAF reduced its number of bases in Germany from four to two; part of this reduction involved the disbandment of 20 Squadron as a Tornado Squadron on 31 July 1992. Operational Conversion Unit (1992-2010) On 1 September 1992 the Harrier No. 233 Operational Conversion Unit RAF at Wittering was renumbered No 20 (Reserve) Squadron. The ‘Reserve’ title indicated that, although the squadron was not a front-line unit, its staff, aircraft and equipment could be used for operations should the need arise. On 1 April 2000, 20 Squadron and the other Royal Air Force Harrier and Royal Navy Sea Harrier squadrons were brought under the control of Joint Force Harrier. The squadron remained at RAF Wittering for the next ten years. In 2010, Joint Force Harrier was reduced by one squadron. IV (AC) Squadron was disbanded as a frontline squadron but, as it had greater seniority, its number was assigned to the OCU as IV (Reserve) Squadron which led to 20 Squadron's disbandment