In the UK?

“The veracity of the reports is brought into question as soon as there is any suspicion of alcohol influencing the observations. Several sightings between 2 and 5 September 1977 are dismissed even though the informants are adamant they saw a “pulsating bright light, emitting a vapour trail” near Derby. The file ends: “Four witnesses had been imbibing at the local hostelry and their sightings were discounted.”