On December 12, 1978, at approximately 4:30 AM, Police Sergeant Tony Dodd and Police Constable Alan Dale of North Yorkshire Police were driving on the A629 near Cononley when they observed a glowing object illuminating the area 100 feet ahead.

This case matters because it is a documented encounter event whose object identity remains unresolved.
Documented
On December 12, 1978, at approximately 4:30 AM, Police Sergeant Tony Dodd and Police Constable Alan Dale of North Yorkshire Police were driving on the A629 near Cononley when they observed a glowing object illuminating the area 100 feet ahead.
Debated
The identity of the object
Debated
The adequacy of the conventional explanation
Unverified
Extraterrestrial origin
Unverified
Any claim stronger than the record supports
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Secondary / debated material.
Documented source.
Documented source.