Welcome to the UFO Magazine Forum Redeye.
The UFO Hunters had a piece on their Cops vs UFOs episode featured a police sighting by dash camera in North Yorkshire from May 2003 you might be interested in.
Kasher and Maccabee analyze.
The feuerkugel were the round ones and the oval turtle shaped ones were called fliegen de schildkröte allegedly during WWII. Different colours at different times were spoken of - they did not "dart about" back then as near as I can tell but they could "approach" and "hold" position on an aircraft very, very precisely - especially the round ones. Some say they "dodged" bullets - others may be of "other" sources. At least one type was thought to have used a form of external combustion, others may have "lit up" for other reasons to do with stimulated ion emission.
Other types of glowing balls like you describe do "dart about". They are "extra-special". The plasma ball type come to mind. Were you aware that plasma can look like a mirror when positively polarized? Some are of completely natural origins. Others? Not so much, maybe.
The really big orange/amber ones are most interesting to me. Some are about 30 feet spherical shapes that shimmer and some seem to have a swirling texture to my eye. Certain materials in a plasma -state are virtually invisible to the human eye and if one could put a "device" inside that plasma sphere... certain aspects of such a device might just be "less-observable".
Welcome again, Redeye. maybe have a look at some YouTube vids and see what "matches" your 1994 sighting and post an example and maybe we can try and gather some data and try and figure out what the heck you saw. The UK was "happening" in 1994... still is.
Silverstone.
Several small UK projects Nick Cook of JDW (Jane's) has mentioned in his writings "might" have some prototypes flitting-about over the past decades. The USA has had spherical mirrored ball sightings among sentry and drone reports of other types.
Fix'