Wiltshire - The Shadow World Government cabal has been spotted holding its AGM in the secret subterranean monument.
New World Order sources said today the highly paranoid Group, founded by MI6/KGB double agent and ex-Harold Wilson era chancellor Denis Healey, may be facing global bankruptcy.
Its decision to meet in the virtually impenetrable 1,000ft diameter inverted pyramid may be an emergency response to the discovery of a huge bugging operation of its earlier preferred venue in Gstaad, Switzerland.
The Stonehenge underground facility of terraced steps descending in successively receding levels underneath the neolithic stone erection was secretly kitted out in the 1990s as a government nuclear shelter.
Locals reckon its houses a retro-engineered alien supercomputer that generates annual crop circle formations.
Late last night Bilderberg Group members were sighted being ferried by mini-submarine from a tributary of the River Avon at nearby Amesbury to the subterranean high-tech bunker.
Top of their AGM agenda is believed to be the disaster of last Saturday's £50 million betting flop on the Queen's Derby whorse Carlton House.
A secret snooping operation by spoofy news reporters has claimed the atmosphere among the global string pullers' AGM 'is grim'.
The choice of venue comes amid stalwart UK government refusal to declassify official Stonehenge documents.
The existence of the subterranean ziggurat was first confirmed some 30 years ago by US reconnaissance patrols ahead of a decision by Mrs Thatcher to allow US siting of cruise missiles in nearby Greenham Common.
When Ronnie Raygun found out the structure was a mirror image of the early 3rd millenium BC Sialk ziggurat in Kashan, Iran he demanded its immediate destruction following the USA's humiliation over the Iran hostage crisis.
An 11th hour change of presidential medication - ordered by White House shrinks - only just managed to tear Raygun's trembling fingers away from the DefCon2 button.
Other urgent topics on this year's Bilderberg AGM are believed to be China's new aircraft carrier, Colonel Gaddafi's X-Box account and 'what to to with the f***ing Middletons'.
Tony Blair's on a 3-year suspension for EU gravytrain abuses.