20 June 2013 Last updated at 19:03 ET
The Ministry of Defence closed its UFO desk because it served “no defence purpose” and was taking staff away from “more valuable defence-related activities”, newly released files show.
The desk was closed in December 2009 despite a surge in reported sightings.
The disclosure came in National Archives files relating to reports of UFOs – Unidentified Flying Objects – between 2007 and November 2009.
They show UFOs were reported at several UK landmarks, including Stonehenge.