some increase in weight was needed for the requisite robustness, and several assemblies were substantially redesigned. Original production, which was authorised in late 1975, was by Royal Ordnance Factory, ROF Nottingham, which has since been incorporated into BAE Systems Land and Armaments. Deliveries started in 1976. In British service The light gun entered service with the British Army in 1976. It was heavier than its predecessor, but helicopters that could carry it, such as the Puma and Westland Sea King, were entering service at the same time. A new vehicle, the Land Rover 101 Forward Control ("Land Rover, one-ton"), was designed as its prime mover in the field (and also for the Rapier air-defence missile launcher). Since the end of the 1990s, the British Army has used Pinzgauer ATVs as their gun tractors. In Arctic service, and elsewhere, the gun is towed by the Hägglunds Bv 206 and is fitted with skis when over snow. In 1982, five batteries (30 guns) were deployed to the Falkland Islands during the Falklands War. In the final phases of the battles around Port Stanley, these guns were firing up to 400 rounds per gun a day, mostly at "charge super", the most powerful propellant charge for which they were designed. They were a significant factor in the British victory. At present, the British Army has four light gun regiments: 3rd Regiment Royal Horse Artillery, 4th Regiment Royal Artillery, 7th (Parachute) Regiment Royal Horse Artillery, and 29 Commando Regiment Royal Artillery. Other regiments are temporarily equipped with it for service in Afghanistan. The 14 (Training) Regiment Royal Artillery uses it for training at the Royal School of Artillery. Four regiments of the Army Reserve, The Honourable Artillery Company (HAC), 103rd (Lancashire Artillery Volunteers) Regiment Royal Artillery, 104th Regiment Royal Artillery and 105th Regiment Royal Artillery) are also equipped with the light gun. Those University Officer Training Corps with "gun troops" train with the L118. On 30 November 2001, an L118 light gun replaced a 25-pounder as the One O'Clock Gun in Edinburgh Castle. By tradition, this fires at one o'clock every afternoon, except on Sundays, Good Friday and Christmas Day. The light gun is also fired by 14 (Training) Regiment Royal Artillery on Remembrance Sunday and Armistice Day each year. As of July 2017, there were 126 L118 light guns in service with the British Army. Design The L118 uses the L19 ordnance on