Program · December 1996 – December 2000 · Old War Office Building, Whitehall, London

Project Condign

Also known as Condign, Condign Report, Condign study, DI55 UAP study

Project Condign was the Ministry of Defence's last study of unidentified aerial phenomena, carried out for the Defence Intelligence Staff's branch DI55 between December 1996 and 2000 by a single contractor, whose name the MoD has withheld. Its aim was to decide whether the UAP reports the MoD had collected for some 30 years were of any value to Defence Intelligence: whether they showed a threat to the UK and, secondly, any military technology of interest. The author built a database of the reports, studied a statistical sample of those received from 1987 to 1997 and examined hundreds more by hand.

The result, "Unidentified Aerial Phenomena in the UK Air Defence Region" (Scientific & Technical Memorandum 55/2/00: an executive summary and three volumes), found no evidence that any UAP were craft of intelligent extraterrestrial or foreign origin, attributed the reports to misidentified man-made objects, ordinary natural phenomena and rare, poorly understood ones, above all buoyant charged plasmas, and recommended that DI55 stop monitoring UAP reports. It did: from December 2000 reports were no longer forwarded to the DIS. The study was classified until the MoD released it, redacted, in response to a Freedom of Information request, which the historian David Clarke had been pressing, and published it on its website on 15 May 2006. The MoD said its name, "Condign", was randomly generated.

Its plasma theory is the study's own hypothesis, not an established finding: the report itself says the formation and persistence of such plasmas is "incomplete or not fully understood".

Sources: Executive Summary of the report (MoD release, 2006; local copy) · MoD FOI publication-scheme page (web archive) · MoD UFO files at The National Archives: DEFE 24/1986/1, DEFE 24/2068/1, DEFE 24/2090/1 (local copies)

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