UFO experts in Gloucester are calling for more sightings to be released to the public in the wake of 35 files being published by the Government.
More than 8,500 pages of UFO discussions, sightings and reports have been released by the National Archives, the largest single batch so far.
But Churchdown's Dave Cosnette, who co-founded UFO and paranormal website Cosmic Conspiracies, called for more to be published.
Dave, 43, said: "The release of these files puts more credibility into the subject. When you take into consideration that people from all walks of life are reporting sightings, it's clear at least some are credible.
"We want more files to be disclosed."
Freedom of information requests and letters from 'persistent inquirers' led to the Ministry of Defence opening the UFO files for the first time.
One of the files shows 15 unidentified aircraft were detected on radar approaching the UK between January and July 2001 in the months leading up to 9/11.
Thousands of encounters are listed including an "alien abduction" in London and an unidentified aircraft shadowing a Lancaster bomber.
Other highlights include claims that the Home Office had emergency procedures for dealing with landed and crashed satellites and UFOs.
Details in the files show how the workload of the UFO desk at the MoD increased by 50 per cent during 1996 and 1997, due to media interest in the subject around the 50th anniversary of the Roswell incident.
In Gloucestershire, Steve Sparkes thought he saw a UFO when orange discs flew across the sky above Gloucester in 2009.
Mr Sparkes, 49, of Hempsted, said he saw red and orange circular objects in the sky when walking out of The Regal pub in St Aldate Street. They later turned out to be Chinese lanterns.
Cosmic Conspiracies said it receives hundreds of e-mails a day with sightings from all over the world.
Dave said he created the website after witnessing a very large triangular UFO in December 1999.
To view their site visit www.ufos-aliens.co.uk.
The National Archives files are available to download for free for a month from the website: www.nationalarchives.gov.uk/ufos