The airport has its origins in the Second World War. In 1941, the Royal Air Force (RAF) Eglinton air base was established as the home to No. 133 Squadron RAF which flew Hawker Hurricanes in defence of the city. In 1942 the base was occupied by No. 41 Squadron RAF. In 1943 the airfield became a Fleet Air Arm base called RNAS Eglinton (HMS Gannet) and was home to No. 1847 Fleet Air Arm Squadron which provided convoy air cover as part of the Battle of the Atlantic. RNAS Eglinton closed in April 1959 with the remaining squadrons moving to RAF Ballyhalbert, County Down and RAF Ballykelly, County Londonderry. After the war, the base remained a military establishment until the 1950s when the Ministry of Defence returned much of the land to the original landowners. The original name of the airport was Londonderry Eglinton Airport and it was usually just referred to as "Eglinton". Some limited commercial activities were undertaken at the airfield during the 1960s when Emerald Airways operated a service to Glasgow. Emerald built a new terminal building and control tower to support services with the first flight to Glasgow operating on 16 September 1967. During most of the 1970s, the only flying at Eglinton was carried out by Eglinton Flying Club which is still based at the airport. In 1978 Londonderry City Council decided to purchase the airfield with a view to improving the transport infrastructure for the northwest of Ireland. The airport has slowly developed since then with private short-haul charters to various destinations within the British Isles, a service which still continues including the recent addition of helicopter pilot training and charter services. Loganair introduced the first scheduled flight between Derry and Glasgow in 1979, a route which was dropped due to rising fuel costs. This route was the only route for ten years until Loganair introduced an additional daily Manchester service in 1989. A major redevelopment programme was undertaken by the council from 1989 to 1993 with grant aid from the European Regional Development Fund. £10.5 million was spent upgrading all of the facilities at the airport including runways, taxiways, access roads, navigation equipment, and runway lighting, as well as a new purpose-built terminal and fire station. The new terminal was officially opened in March 1994. The name of the airport was officially changed from Londonderry Eglinton to the City of Derry Airport by Derry City Council following nationalist support within the newly renamed council. However, as of May 2014, the Aeronautical Information Publication published by the UK's air navigation service provider, National Air Traffic Services, still shows Londonderry/Eglinton. At that time there were still only two scheduled routes carrying about 40,000 passengers each year. 1995 saw the arrival of Jersey European Airways who attempted to operate a short-lived shuttle link between Derry and Belfast City Airport. During 1998 and 1999 safety improvements were undertaken at the airport as a matter of priority. As the airport served Northern Ireland and County Donegal in the Republic of Ireland, funding was sourced and thereafter provided by the Irish Government in addition to that provided by the British Government and Derry City Council. These improvements meant that larger aircraft could use the airport, thus, Air 2000 started holiday charter flights, on behalf of Falcon Holidays, in May 1999, followed in July by Ryanair who operated scheduled flights. The Ryanair service to London Stansted grew substantially and the Loganair routes continued to operate until October 2008 as a British Airways franchise, including a sector to Dublin, initiated as a public service obligation route, subsidised by the Irish Government. Soaring fuel costs saw all British Airways operations to Northern Ireland suspended.