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I spent two decades on the trail of the UK Ministry of Defence’s cache of secret UFO papers. But little did I know that my FOI campaign triggered off a mole-hunt among the spooks – and a probe to discover who my sources were. One of the surprises hidden within the latest UFO papers released at The National Archives is a declassified memo that asks the MoD’s security services to investigate why I wanted to see secret UFO files – and who might have been leaking data to me about them.

Dr David Clarke drdavidclarke.co.uk 7-2-17

The memo – once classified ‘Secret UK Eyes Only’ – was written in August 2000 by a desk officer in the MoD’s secret-squirrel space intelligence unit, DI55. It was addressed to MoD Security

At the time DI55 was in a spin because a series of UFO report files had disappeared from its archives.

This came to light soon after one of its contractors (who has never been named) had completed his work on the infamous Condign Report on ‘Unidentified Aerial Phenomena’.

As the spooks rooted through their filing cabinets a letter arrived from me, addressed to
the MoD records officer at New Scotland Yard. At the time I had given up a job as a vacuum cleaner salesman and was working as a journalist, looking for a scoop.

Tony Blair’s government had introduced a Freedom of Information Act (FOIA) but it was still five years from implementation.

So it was that I spent many hours working through UFO records at the National Archives in Kew and came across references to the mysterious DI55.

They were a branch of the Defence Intelligence Staff who, since 1967, had been the government agency responsible for the investigation of UFO incidents that might have some bearing on the defence of the realm.

UFO sighting reports were not usually subject to secrecy. But DI55 were also involved in top secret studies of aerodynamic missiles and satellites, so their very existence – and their interest in UFOs – was secret until quite recently.

If the truth really was out there – as The X-Files proclaimed – then I suspected DI55 would know all about it.

Indeed, in one of their recently declassified files, a desk officer refers approvingly to a Sunday People headline that describes them as ‘Our Secret Army Against the Aliens’.

My letter, dated 21 July 2000, requested access to their surviving records under the Code of Practice (a precursor to FOIA). It arrived in exactly the same month that someone in DIS realised a number of these files had gone missing.

This odd coincidence appears to have set alarm bells ringing in the intelligence agencies.

‘Dr Clarke is clearly well directed towards the documents he sees as relevant,’ the desk officer wrote to his security minders. This led him to be ‘suspicious’ especially as these files contained ‘very sensitive data’.

Why was I was interested in files only they knew were missing?

And who had informed me they were ‘missing’?

The memo implies that I may have been tipped off by someone in the Defence Intelligence Staff – perhaps even the author of the Condign study – who was aware of what the files contained, and had expressed an interest in them before. It continued:

‘Pending the publication of [the Condign report] on this subject DIST is very sensitive to the potential mischief that unauthorised use of the information contained in these files may cause if used to support uninformed Press and private publications on UAPs’.

MoD Security were then ordered to find the missing files urgently. They were also tasked to find out more about ‘Dr Clarke and his sponsors’ and any potential sources I might have in the intelligence community.

Quite what this investigation turned up remains a mystery – because the relevant papers are, you will not be surprised to hear, missing from the file.

But I can reveal that Our Man in Sheffield must have passed whatever security vetting was deemed appropriate by Her Majesty’s Secret Service.

The ‘missing files’ were found, and can now be downloaded by anyone – with or without security clearance – for a small charge from The National Archives website.

And in May 2006 I was invited to MoD Main Building to receive a first-generation copy of DI55’s once secret final report on UFOs – or UAPs, as they preferred to call them.

Secret no more. My job was done.


I eventually discovered the ‘truth’ about what DI55 knew about UFOs. It was hidden in plain sight in one of their own documents from 1995, released by The National Archives in 2017. Sent to the MoD’s UFO desk and signed off by a DI55 Wing Commander it says:

‘I see no reason for continuing to deny that [Defence Intelligence] has an interest in UFOs. However, if the association is formally made public, then the MoD will no doubt be pressurised to state what the intelligence role/interest is. This could lead to disbelief and embarrassment since few people are likely to believe the truth that lack of funds and higher priorities have prevented any study of the thousands of reports received’.

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The release by Britain’s Ministry of Defence of 15 of its last remaining UFO files at the UK’s National Archives has revealed details of a stunning Cold War close encounter witnessed by the entire crew of a US Air Force spy-plane. Formerly secret RAF files opened at The National Archives include a detailed account of an incident on 19 October 1982 when a USAF RC-135 plane, monitoring Soviet military activity, was buzzed by ‘a big object’ over the Eastern Mediterranean.

By David Clarke ddrdavidclarke.co.uk 6-30-17

According to the files, British personnel at RAF Troodos, a remote base on the island of Cyprus listened in amazement to the radio calls of the American crew as the encounter unfolded at 35,000 feet above the sea.

The UFO – – described as covered in ‘a multitude of flashing lights 20 at a time’ – was picked up on the spylane’s radar as it approached from the south.

It then circled around the plane, call-sign Beano 73 – and closed in as the navigator appealed for help from the ground.

Two US Navy F-14 fighters were scrambled from an aircraft carrier and a RAF Phantom was diverted from a night flying exercise to intercept the UFO, south of the island of Cyprus.

As the three interceptors approached the USAF crew saw the UFO depart towards the African coast. Nothing was seen by the fighter pilots.

The files reveal how RAF personnel at the Troodos radar station monitored the entire incident for a period of 90 minutes, beginning shortly after 4pm local time.

Radome at 280 Signals Unit base, RAF Troodos, Mt Olympus, Cyprus – one of the most important overseas British installations (credit: Wikipedia/Ed Weissman)

Officially the US Air Force’s UFO Project, Blue Book, was closed in 1969. The British Ministry of Defence closed its own UFO desk in 2009 and its secret space intelligence unit, DI55, said it was no longer interested in ‘unidentified aerial phenomena’ (UAP) in 2000.

But the newly-released RAF file reveals that officials ordered a transcript to be made of the tape recording that captured radio transmissions made between the spyplane crew and ground controllers.

Copies of the report were circulated to Assistant Chief Scientist (RAF), DD Ops (GE) RAF, DI55 and DSTI.

Film provided by the RAF Troodos radar station was carefully studied by photographic experts in London and large prints, taken from the radar picture, were prepared for scrutiny by intelligence officers.

The file does not reveal what happened to this evidence. The results of the joint UK/US investigation do not appear in the file.

An extract from the RAF file on the incident [David Clarke/The National Archives]

But a tentative explanation is offered by a senior RAF official, who wrote: ‘We have a strong suspicion that the “UFO” was a mirage effect from lights on the coast of Israel or Lebanon’.

A signal reporting the sighting sent from RAF Troodos to MoD UK on 20 October describes the UFO as ‘larger than [a] RC-135’.

Boeing RC-135 aircraft are used by the USAF and RAF to support intelligence gathering. They have been used in every armed conflict including Cold War operations around the borders of the former Soviet Union. The aircraft are 136ft (41m) in length with a wingspan of 130ft (nearly 40m).

The RAF signal reporting the encounter says the ‘object’ was first spotted:

“…initially about two miles from wing of RC-135…moved position around aircraft and closed…object tailed Beano 73 for 90 mins on its northeast/southwest race track….”

The signal says the UFO was seen by the ‘whole crew’.

Three RC-135s were purchased by the RAF in 2017 to serve with 51 Squadron based at RAF Waddington in Lincolnshire. The crew includes two pilots, a navigator and up to 25 mission staff.

Elsewhere in the file a RAF Group Captain collated information on UFO reports received by his air defence staff for a thirty year period ending in 1996, in response to a Parliamentary Question from the Labour MP for Don Valley, Martin Redmond.

He asked all radar stations including the Ballistic Missile Early Warning Station at RAF Fylingdales on the North York Moors to submit UFO data to HQ No 11 Group.

His report says he could find “no reports or mention [was] found of UFOs detected by ADGE [Air Defence Ground Environment] units or 11/18 Group aircraft using radar equipment“.
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