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This research guide from The National Archives was written by Dr David Clarke in March 2008 and revised in August 2008. It traces British government interest in UFOs from the phantom airships of 1909 through the 1951 Flying Saucer Working Party, Air Ministry and MoD investigations, and the 1979 House of Lords debate. It notes that official bodies found most sightings had ordinary explanations. It also lists key National Archives file references, including papers on the Rendlesham Forest incident.
3 Soviet expansion. Reports and correspondence between the Foreign Office, Air Ministry and the British air attaché in Stockholm are contained in FO 371/56988 and FO 371/56951. An air intelligence report on the „ghost rockets‟ of 1946 can be found in AIR 40/2843. Reports of ghost rockets preceded by six months the first sightings of „flying saucers‟ over the mainland of the United States. In December 1947 the newly created US Air Force set up a project, code-named Sign to investigate the growing mystery. USAF Lieutenant General Nathan F Twining's initial conclusion was „the phenomenon reported is something real and not imaginary or fictitious.‟ (See further reading) 3. British Government interest, 1950-1951 The British Government did not begin any official inquiry into the UFO mystery until 1950. During the spring and summer of that year a large number of 'flying saucer' sightings were made in Britain for the first time and the media started to take an interest. Two Sunday newspapers serialised the first books on the topic that had been published in the USA. This led a number of senior figures, both in the establishment and the scientific community to treat the subject seriously for the first time. The Sunday Dispatch was encouraged to publish stories by Lord Louis Mountbatten, who was later to become Chief of Defence Staff. Mountbatten was one of a small group of influential military officials who believed UFOs were real and of interplanetary origin. Another senior official who took reports of UFOs seriously was Sir Henry Tizard. He is best known for his work on the development of radar before the Second World War. Post-war Tizard became Chief Scientific Advisor to the Ministry of Defence and came to believe that „reports of flying saucers should not be dismissed without some investigation‟ (DEFE 41/74). It was as a direct result of his influence that the MoD was asked to set up a small team of experts to investigate reports of flying saucers under the Directorate of Scientific Intelligence/Joint Technical Intelligence Committee (DSI/JTIC). The Flying Saucer Working Party operated under such secrecy that its existence was known to very few. However, a reference to a study of flying saucers emerged in 1988 when a file of correspondence between Winston Churchill and the Air Ministry was opened under the 30-year rule, PREM 11/855. On 28 July 1952 the Prime Minister asked the Air Minister: 'What does all this stuff about flying saucers amount to? What can it mean? What is the truth? Let me have a report at your convenience.' The response, dated 9 August 1952, began 'The various reports about unidentified flying objects, described by the Press as “flying saucers”, were the subject of a full intelligence study in 1951'. Several unsuccessful attempts were made to trace this study but in 1998 the minutes of the DSI/JTIC were released in DEFE 41/74 and DEFE 41/75. These revealed how the working party was established in August 1950 under the following terms of reference: 1. To review the available evidence in reports of 'Flying Saucers'. 2. To examine from now on the evidence on which reports of British origin of phenomena attributed to 'Flying Saucers' are based. 3. To report to DSI/JTIC as necessary.
Document, cited by the archive. The PDF is mirrored here; the original link is above. 13 pages are in the text index: search them above, or from the library's search.