The case record
What was reported?
Two hikers reportedly photographed a large diamond-shaped object with an aircraft nearby; a surviving print later became public.
- Reported date
- 4 Aug 1990
- Witnesses
- Hikers · 2
- Investigation
- UK MoD
Evidence in the record
Photograph; witness report
Competing explanations
Official and research context
No public definitive identification
Conventional explanations
Experimental aircraft / reflection / hoax theories
Arguments that remain contested
Original negatives and witness identities remain unavailable publicly
Locations & timeline
Coordinates are representative. Area and route labels do not imply exact paths or object positions.
- Primary reference location
Moorland near Calvine
Calvine
Reported event location · Approximate area radius: 2 km
56.769°, -3.957° · area · High
Record notes
Use approximate moorland location and mark confidence.
Imported starting record; individual claims and source links await editorial verification.
Original dataset status: Unresolved / disputed