Secret files on UFO sightings have been made available for the first time by the Ministry of Defence.
The documents, which can be downloaded from the National Archives website, cover the period from 1978 to 1987.
They include accounts of strange lights in the sky and unexplained objects being spotted by the public, armed forces and police officers.
One man explained in great detail his “physical and psychic contact” with green aliens since he was a child.
The writer said that one of them, called Algar, was killed in 1981 by another race of beings as he was about to make contact with the UK government.
The letter’s author said he visited their bases in the Wirral and Cheshire, while his wife reported seeing a UFO shot down over Wallasey on Merseyside.
The eight released files are part of almost 200 files set to be made available over the next four years.
These documents will be available to download for free for the first month.