While the United Kingdom had witnessed its fair share of alleged UFO sightings, Nick Pope, former official UFO investigator for the British Ministry of Defence, has looked deep into hypothetical contact with extraterrestrials, the Daily Star reports.

Referring to certain previous sightings of suspected extraterrestrial craft in the UK, including “a wave of sightings over a six-hour period in late March 1993, with several dozen witnesses in different parts of the country,” Pope noted that “many of the witnesses were police officers and military personnel who saw a huge, triangular-shaped craft, emitting a low-frequency humming sound.”

He also mentioned one particularly notable incident in Rendlesham Forest, which occured in December 1980, saying the “most convincing case in the MoD’s real-life X-Files” remains unexplained.

He added that most instances of suspected UFO sightings turn out to be “misidentifications of things such as aircraft lights, satellites, and Chinese lanterns,” though a small number of sightings “remain unexplained.”

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