This and the Westall sighting in Australia are the two most profound examples of UFO sightings (in that they were both mass sightings in which children and teachers recounted the experiences over many years).
Not sure if you have seen this article? Very good accounts of the incident.
Agreed—the Zimbabwe school sighting is a very strong case.
John Mack has had some excellent discussion in his books.
The folks who think this is all about Deep State technology are proven wrong by this case.