Former News International chief executive Rebekah Brooks today insisted she had only "brief and inconsequential" discussions with Chancellor George Osborne over parent company News Corp's bid to take over BSkyB.
And she denied ever having "inappropriate" conversations about Rupert Murdoch's efforts to buy the remaining 61% of the satellite broadcaster with anyone who might be in a position to influence the Government's decision.
The issue of contacts between Brooks and the Chancellor was raised by the release of emails from News Corp lobbyist Frederic Michel by the Leveson Inquiry last month, which included one in which she reported Osborne's reaction to an Ofcom announcement on the BSkyB bid: "Same from GO - total bafflement at response".
In a written statement to the inquiry today, Brooks said she could not remember sending the email, but assumed that the initials GO referred to the Chancellor, who her records show she met "socially" the previous evening.
But she played down the significance of her comment, telling Leveson: "The email clearly shows that whatever was discussed was brief and inconsequential. The issue was topical and of course everyone would have known that, as the CEO of News International, I would have been likely to support the bid."
Brooks said in her statement that she had no official role in the BSkyB bid, which did not involve News International, but found herself "drawn into the debate" and would certainly have discussed it at the Conservative conference in October 2010.
"When the matter arose in conversation, I am sure that I would have expressed my views forcefully, particularly given the vocal opposition," wrote Brooks. "I have no doubt whatsoever that opponents of the bid were doing likewise.
"At no point did I ever have an inappropriate conversation with anyone who had any influence over what the Government might do."
Brooks insisted there was "nothing wrong" in her, as editor of The Sun and News of the World, forming friendships with senior politicians and meeting them socially as well as professionally. Regular contact between the press and politicians - as well as public officials and police chiefs - was "of vast importance to our democracy" and any suggestion they should not meet was "entirely wrong", she said.
In her written statement to the inquiry, she said she had "numerous" meetings" with David Cameron and Tony Blair and formed a "close friendship" with both Cherie Blair and Gordon Brown's wife Sarah.
But she suggested that reports about a "pyjama party" hosted by Mrs Brown for her and Rupert Murdoch's daughter and wife at the PM's country residence Chequers were overblown.
"The year I turned 40, Sarah was concerned that I had not planned any birthday celebrations," wrote Brooks. "That same year, both Elisabeth Murdoch and Wendi Murdoch also celebrated their 40th birthdays, and so Sarah invited all three of us with some mutual friends to have dinner at Chequers and, due to logistics, to stay over that night and leave after breakfast.
"That is the extent of the so-called 'slumber/pyjama party'. Gordon Brown was not present at the dinner, but he may have been there the next morning before we all left."
Brooks said she had met every leading politician at some point or other while a newspaper editor, describing Blair and his advisers and ministers as "a constant presence in my life for some years".
She became "close friends" with Blair, as well as Alastair Campbell and his partner Fiona Miller, though she described her contacts with Gordon Brown as "a working relationship".
Brooks recalled meeting Cameron "at numerous political and social occasions (including working breakfasts, lunches, receptions, News Corporation summer parties, party conferences and dinners)" and speaking regularly to him on the phone while he was leader of the opposition.
But she had not been to Downing Street and had few formal meetings with him since he became Prime Minister, seeing him "mainly at social events, celebrations or other occasions".
Following her 2009 marriage to Charlie Brooks, an old family friend of the Camerons, she became friends with the PM. He was a personal guest at social dinners at the Brooks's home, including on December 19 2009 and December 23 2010, and she visited him at Chequers and met him at the homes of other friends and family.
In her statement, Brooks emphatically denied that these friendships were in any way untoward.
"It is important to understand... that close and effective working relationships must not lead to compromise on either side," she wrote.
"I have never abused my friendships to gain access to information that otherwise I could not have obtained as a professional journalist, nor have I ever compromised my independence through loyalty to a friend who is also a politician.
"But whether a relationship develops into friendship or not, a relationship of trust and confidence between the press and politicians does have great value. Where I have known a politician well, this has led on many occasions to a free and frank exchange of views as we have sought to change policy or better understand why the Government is taking a particular stance.
"If our relationship were always confrontational and antagonistic, we simply would not engage with politicians to that degree.
Equally, an amicable relationship often helps, particularly in decisions in publishing stories of a personal nature."
Brooks said that she believed her lobbying and campaigning as an editor helped influence Government policies on issues like domestic violence and the right for parents to be informed of paedophiles living in their area.
But she dismissed as a "myth" the idea that she was able to dictate decisions on ministerial appointments and said she did not believe that newspapers were able to change the result of elections. Their decisions on who to endorse were more important as "an early indication of the outcome", she said.
While Gordon Brown regarded The Sun's 2009 endorsement of Cameron for Prime Minister as a "betrayal", Brooks said it was "fairly inevitable" given the paper's opposition to his policy platform.