The British reporter Catherine Gun, a former British intelligence officer, considers the movie "Official Secrets," which tells her story, carries a message reminding of the responsibilities in the 2003 invasion of Iraq.
Katharine Gun, a 45-year-old former CIA interpreter, revealed a secret US memo asking the British to eavesdrop on UN Security Council delegates before a crucial vote on the Iraq war.
Desperately, Gann believes today that former British Prime Minister Tony Blair and US President George W. Bush succeeded in polishing their image despite their crucial role in invading Iraq without a UN mandate.
"This film can correct all this," she told AFP ahead of the screening at the London Film Festival.
He accused Blair, who described his opponents as "Bush's spoiled dog", at the time to submit to the US president without debate under the false pretext of the existence of weapons of mass destruction.
The memo, which was leaked to the press, sparked a violent policy and accused Catherine Gan of violating the Official Secrets Act. The charges were dropped in 2004 in the absence of evidence.
Like her, the director hopes to recall the illegitimate nature of the conflict. "Two leaders who were forced to admit that this WMD story is pure invention, manipulation and lies, cannot be rehabilitated," said South African Gavin Hood.
"It is terrible," he said. "It is a reinstatement of George Bush just because (US President Donald Trump) looks worse. We have to stop all these absurdities."
"Official Secrets" was released in August in the United States and in October in Britain, before public screenings later this year.
"I needed a long time to accept what happened," said Katharine Gun, who has been living in Turkey since 2011 in Turkey with her husband and daughter. "Every time I try to tell her, I feel nervous again."
After she was fired in 2003, Gun continued to work at the Government Communications Department in southern England.
"All I wanted was to go back to a normal life and that's what I did," she said, noting that she worked as a Chinese teacher and even taught former colleagues in the British electronic intelligence service.
The second major character in the feature film is Martin Bright (actor Matt Smith), journalist for The Observer, who published the memo. "For a journalist, getting a story on Sunday's headline is like scoring a goal in Wembley," he said.
Katharine Gam first reserved the idea of participating in the film. But she changed her mind after talking about the case in detail with Gavin Hood, who often makes politically-acclaimed movies, including My Names Totsi (My Name Is Totsi) (2005) and Eye in the Sky (IN the Sky) (2015).
"I tell this story because I think it raises important issues about loyalty ... to anything and to whom we should be loyal?"
Gann believes that the lack of accountability today explains why Trump and British Prime Minister Boris Johnson have been lying. "This gives a very bad example," she said.