'What does all this stuff about flying saucers amount to? What can it mean? What is the truth?' Winston Churchill, Prime Minister's personal minute, 29 July1952

Original records newly released by the Ministry of Defence and now held at The National Archives in Kew reveal how British Intelligence and the CIA investigated many Cold War sightings, from the Roswell incident of 1947 to ghost aircraft, Radar Angels to the RAF's confidential files. The UFO Files sheds new light on many famous cases, such as RAF Topcliffe, 1952; the Flying Cross in Devon, 1967; RAF West Freugh, Scotland, 1957; and, the Berwyn Mountains UFO crash and the Phantom Forest incident. Dramatic witness statements and personal interviews - many undertaken by David Clarke himself - combine with rarely seen photographs, drawings and newly available documents to offer a unique guide to our most intriguing mysteries.