R e s e a r c h
Martin SHOUGH & Wim VAN UTRECHT
All we have on this British case is a scrap of info from the MoD files summarizing a report made by two air traffic controllers at London's Heathrow Airport. We reproduce this document below with thanks to Dr. David CLARKE for bringing it to our attention.
Comment - At 08:20 ZT on December 17, 1992, the Sun was just clearing the horizon at 132°. The UAP was estimated to be at a distance of 7 miles (11 km) and disappeared "steadily". It is not sure what the "130" means at Q.6. Perhaps this is the terminal azimuth, which would imply a 40° motion.
How to picture an "inverted boomerang shape" is also open to interpretation. In essence, all we have are a few lines mentioning a black silhouette observed against a dawn sky.