The Condign project was a secret UFO study undertaken by the British Government's Defence Intelligence Staff (DIS) between 1997 and 2000. (It should not to be confused with the American Condon Committee, which also had to do with UFO research).
The results of Project Condign were compiled into a 400-page document titled Unidentified Aerial Phenomena in the UK Air Defence Region that drew on approximately 10,000 sightings and reports that had been gathered by the DI55, a section of the Directorate of Scientific and Technical Intelligence (DSTI) within the Defence Intelligence Staff (DIS).
It was released into the public domain on 15 May 2006 after a September 2005 Freedom of Information Act request by UFO researchers Dr David Clarke, a lecturer at Sheffield Hallam University, and Gary Anthony, a former BUFORA astronomical consultant. The identity of the report's author/s was not made public.