This document discusses a disinformation campaign in ufology regarding a flying triangle sighting near Sheffield, UK in 1997. It outlines eight stages the author argues were used to suppress investigation into the sighting: 1) Getting a false story accepted that nothing unusual occurred. 2) Undermining and lying about witnesses. 3) Character assassination of investigators. 4) Entrapment attempts. 5) Spreading misinformation online and in publications. 6) Ridicule and intimidation tactics. 7) Obstruction of official documentation requests. 8) Ongoing attempts to discredit investigations after the fact. The author focuses on the roles of certain individuals, including David Clarke, Andy Roberts, and Tim Hepple/Matthews, in further