UK Government UFO Document:
“Unidentified Aerial Phenomena in the UK
Air Defence Region: Executive Summary”
(Ministry of Defence, London, UK)

The results of Project Condign (1996-2000) were compiled into a document titled “Unidentified Aerial Phenomena in the UK Air Defence Region”:

http://www.mod.uk/DefenceInternet/FreedomOfInformation/PublicationScheme/SearchPublicationScheme/UapInTheUkAirDefenceRegionExecutiveSummary.htm

Wikipedia article: “Project Condign”:

http://en.wikipedia.org/wiki/Project_Condign

(wikimedia.org image)