McMullan worked for the NOTW for seven years, in roles including as a war correspondent and as one half of a double act with the infamous "Fake Sheikh" Mazher Mahmood.
He admitted to once trying to hack into the phone of former England soccer captain David Beckham but was caught out when Beckham picked up the call.
It took a personal warning from Lord Leveson on self-incrimination to halt McMullan, who was in full flow. He later told the inquiry, during discussion of the activities of Glenn Mulcaire, the private investigator commissioned to hack phones by the Murdoch-owned tabloid: "It was a shame you said what you did earlier, I would have quite happily spoken more about it."
McMullan said a succession of British Prime Ministers had "cosied up" to the Murdoch empire and accused David Cameron of effectively turning a blind eye to the criminal practices that had gone on under Coulson's regime. He said the Prime Minister had ended up with "Murdoch-lite - James [Rupert's son] and Rebekah Brooks" and Cameron had been "moulded by the arch-criminal, Rebekah Brooks, the criminal-in-chief".
He defended practices of intrusion that have dominated the inquiry to date claiming, in one of his most controversial passages of his exposition, that "the hacking of Milly Dowler's phone was no bad thing for a well-meaning journalist to do". McMullan did not condone the actual hacking but claimed the police force looking for Milly were full of "Inspector Clouseaus". "We were doing our best to find the little girl, the police were utterly incompetent," he said.
He also said the British people did not need Max Mosley to tell them what to put in newspapers and said the NOTW's five million readers were the ultimate "judge and jury" of what was put on its pages.
Former Formula 1 boss Mosley took legal action against the paper and won £60,000 ($122,000) damages over an article in 2008 that branded him a sexual pervert engaging in a Nazi-themed orgy. "Privacy is the space bad people need to do bad things in," McMullan said.
JOURNALISTS HAVE THEIR SAY
Journalists wanting to publish private information about individuals should have to justify what they are writing before a public interest advisory body, the Leveson Inquiry heard.
Nick Davies, the Guardian reporter credited with revealing the extent of phone hacking by the News of the World, said such a body would help distinguish between what was published in the public interest and what was merely of interest to the public.
He said the issue of what should and should not be published arose during coverage of the United States war logs from Afghanistan obtained by WikiLeaks, when it became obvious that publishing the names of people who gave information to the coalition forces could get them killed.
Davies said the private detective Glenn Mulcaire was the "facilitator" for the hacking of murdered teenager Milly Dowler's mobile but that News of the World journalists deleted some of her phone messages.
Also speaking yesterday, the former Daily Star journalist Richard Peppiatt claimed he received threats and may have had his phone hacked after he quit the paper in protest at what he claimed was its anti-Muslim propaganda.
He claimed editorial decisions at the paper were "dictated more from the accounts and advertising departments than the newsroom floor" but added that the paper "did not really use" private detectives, adding: "I don't think that was some sort of ethical decision as much as a financial one."
- INDEPENDENT