Documents from the Ministry of Defence classified archives show staff believed aliens could visit for “military reconnaissance”, “scientific” research or “tourism”.
In a 1995 briefing now published by the National Archives, a desk officer said the purpose of reported alien craft sightings “needs to be established as a matter of priority”, adding there did not appear to be “hostile intent”.
“If the sightings are of devices not of the earth then their purpose needs to be established as a matter of priority. There has been no apparent hostile intent and other possibilities are: 1) Military reconnaissance; 2) Scientific; 3) Tourism.”
He added that “if reports are taken at face value” they showed extraterrestrial vehicles had “a very wide range of speeds and are stealthy”.
Thus, he suggested, “we could use this technology, if it exists”.