The files contain a wide range of UFO-related documents covering the years 1986–1992.
If you want to find out more about close encounters over Gatwick Airport, alien abductions, stray satellites - and what the UK Government thought of it all - then this is the place to be.
(The files are in PDF format)
Start by reading the highlights guide (PDF 442kb) to help you navigate your way through the files.
Bron: TheNationalArchives