Eyewitness Sighting Series Picture # 3 (IN COLOR)

Eyewitness states : "It was hovering silently above the bridge- maybe 50-100ft up and it was a metallic silver/grey triangular craft, elongated like an isoceles triangle or pyramid lying on it side."
Date and Location : Late 70's /Early 80's, Darcy Lever, Bolton, Greater Manchester, UK.