Los Angeles - A Hollywood source claimed today Madonna was deliberately thwarted 'on copyright grounds' from having so much as a sneak peek at historical archives about the Duchess.
"Someone in Windsor Castle is still pretty freaked out," royal correspondent at celebwatch site LA HagFagSlagMag.con Davina Belladonna commented.
"Apparently the Duke and Duchess successfully sued the Queen Mother about a decades-long campaign of harassment and intimidation," Belladonna added.
"The woman was then branded a complete jerk, her rollercoaster boozing and gambling binges laid bare during the trial."
The lawsuit papers also describe the Queen Mother's paranoid anti-Americanism as the real issue behind her lifetime obsession.
In 1979 that mania went into psychotic overkill with the eventual outing of the Queen Mum's DNA brother Sir Anthony Blunt as a MI6/KGB double agent.
The vile old Scottish harridan died bankrupt in March 2002 after shelling out millions in libel damages following the successive libel judgements.
These upheld claims that she was a 'drunken, dissembling, fantasist troll' who used her fascist extended family to stalk the Windsors.
"Someone somewhere owns the legal rights to all this stuff," the website's justice corresponded added.
"It could just be that after her less than stellar movie career they just didn't want Madonna getting a slice of the action."
Guy Ritchie's former chauffeur has more on this stuff.