A drawing and description of a "flying saucer" sighting over Watford in Hertfordshire was also among the 6,000 pages of newly-released documents.
A sighting above Trenale Lane, near Tintagel, Cornwall, was also documented. The artist identified a dome at the front of the craft as the cockpit.
Another eyewitness submitted a drawing of a triangle-shaped craft seen close to a pylon above Knutsford in Cheshire.
Two "missile-shaped" UFOs were also captured in a sketch by a witness in Smethwick, West Midlands, in 1954.
A triangle-shaped craft was also drawn by a witness who described seeing it above Oldbury, West Midlands, on 9 August 1995.
Another notes the diameter of the unidentified craft they saw flying above their car in Malmesbury in Wiltshire. In his report to police the following day, the man, from Newport, Gwent, said his car had been surrounded for five minutes by a "tube of light" which had swept towards him from the north east, during which time both his radio and mobile phone stopped working. The man reported that he was ill following his brush with the unknown.
The report said:
"He felt and was indeed sick later on. He is still feeling ill today (28/1/97) and has developed a skin condition. Advised to see doctor."