Secret papers collected by the government will be declassified after 50 years – but only after the election.
The UFO sightings dossier will expose what the Government knows – and what it doesn’t.
Many who do not believe the official story on extra-terrestrial life have said they expect ‘Britain’s Roswell’ to be solved.
The Rendlesham Forest incident has been kept under lock and key by successive British governments since the 1980s.
UFO experts believe the documents will be from 1971-76, 1996-2000 and 2004.
They would have been collected by the Ministry of Defence, which used to have a specific desk dedicated to investigating extra-terrestrial life.
However, the desk was closed down in 2009 because it served ‘no defence purpose’.
The so-called X Files have been held back by the National Archives in 2013.
It was rumoured that there were 18 documents that were not allowed to be released.
The Government has pushed back the release date twice after it was initially scheduled for a release in March.
But the confusion in Theresa May’s leadership caused by Brexit apparently stopped the release.
A spokesman for the National Archives told German website Grenzwissenschaft-aktuell: ‘Due the upcoming election here in the UK and the rules relating to government departments during the pre-election period, the files will not be released until after the election.
‘We are working to ensure that the files are ready for release as soon after this period as is possible, hopefully around the middle of June.’
It is hoped the the dossier will explain the Rendlesham Incident.
But it’s not the Holy Grail for alien conspiracy theorists.
What is the Britain’s Roswell?
The Rendlesham Forest incident is one of the most famous of British UFO theories and has yet to be cracked.
Strange lights were reported near RAF Bentwaters and RAF Woodbridge during a period of three nights. Between December 26-28 in 1980.
It was first exposed on voice recordings from senior American soldiers, who also drew disturbing pictures of the object they saw at the British forest.
‘While in Rendlesham Forest, our security team observed a light that looked like a large eye, red in colour, moving through the trees,’ Colonel Charles Halt said.
‘After a few minutes this object began dripping something that looked like molten metal.’
Another claimed to have telepathically ‘received’ a binary code, which has never been deciphered.
Some of the ‘marks’ left at the site have either been used as evidence of UFOs or simply rabbit holes.
But it certainly has left an impact on the conspiracy theorist community.
‘Even today ufologists squabble over what really happened at Rendlesham Forest in late December 1980. Did an alien spaceship land here?’ Nigel Watson, author of the UFO Investigations Manual, said.
‘Were the US airmen who saw the UFO fooled by the light from a nearby lighthouse? Was it a smokescreen to hide a nuclear incident or some other type of covert operation? Or was it a hoax?’
Nigel Watson, author of the UFO Investigations Manual, was cautious about what was truly on offer with the release of the new documents.
‘Getting the majority of the documents into the public domain was a slow process, which was mainly due to the efforts of Dr David Clarke, Prinicipal Research Fellow at Sheffield Hallam University,’ he told MailOnline.
‘I’m reliably informed that these remaining files contain duplicates of documents already made available to the public.
‘It seems very unlikely they will contain anything like the type of evidence UFO supporters yearn for, like crashed saucers or interviews with aliens.’
The National Archives told Metro.co.uk that they were a non-ministerial government department, and added that they had made the decision to publish the documents after the election because of ‘purdah’ rules and said there was ‘nothing more to it’.