It is possible that the Chancellor had come to a different conclusion from the PM as to which way the Maria Miller crisis was going.
The resignation of Culture Secretary following sustained pressure shows that, five years on, fury over expenses has only grown.
Maria Miller's resignation letter has been made public, along with David Cameron's response.
The TaxPayers' Alliance said given this response to the resignation of Maria Miller:
Maria Miller had wrongly claimed significant amounts of taxpayers’ money and her less-than-contrite apology to the Commons suggested a failure to grasp the gravity of the situation, which caused understandable public anger.
While claims for mortgage interest are no longer permitted under the new expenses regime, this episode is a stark reminder that MPs need to pay extremely careful attention when they are spending taxpayers’ money.
– Jonathan Isaby, Chief Executive of the TaxPayers' Alliance
It also underlines the need for a genuine system of recall to be introduced so that voters can hold their MP to account mid-term if they feel that they have been let down. This would be a powerful accountability mechanism to keep our elected representatives on their toes.
Sajid Javid, the MP for Bromsgrove and current financial secretary to the Treasury has been appointed as the new Culture Secretary following Maria Miller's resignation, the prime minister has said:
Sajid Javid MP is the new Secretary of State for Culture, Media, Sport and Equalities.
Nigel Farage will be speaking at a Ukip meeting in Maria Miller's Basingstoke constituency tonight, the party's director of communications has said on Twitter:
UKIP meeting 8pm tonight in Old Basing Village Hall, Basingstoke. Our PPC will be unveiled and Nigel Farage will be the keynote speaker!
Maria Miller has said she takes "full responsibility" for her decision to resign as Culture Secretary, saying she wants to "make sure that I can move on".
Speaking publicly for the first time since her resignation was announced, Ms Miller said, "I think it is the right thing to do to, remove what has become really an unhelpful and very difficult distraction for colleagues."
Asked if she accepted that she had done something wrong, Ms Miller answered: "I have made it clear and apologised unreservedly to the House of Commons and made sure that it was clear to everybody that I took full responsibility for those findings.
"I want to make sure that the situation is clear to everybody and make sure that I can move on".
Maria Miller said she decided to resign her position as Culture Secretary as her situation had become an "enormous distraction" to the Government and its achievements.
Miller said: "This has been a really difficult 16 months - because I was cleared of the central allegation made about me by a Labour Member of Parliament, I hoped that I could stay.
"But it has become clear to me that it has become an enormous distraction. It is not right that I am distracting from the incredible achievements of this Government."
It was the first time Miller has spoken publicly since her resignation as Culture Secretary was announced earlier this morning.
Maria Miller's resignation was "entirely" her own decision, cabinet colleague Michael Gove has said.
Speaking on BBC Radio 4's Today programme, the Education Secretary said he had been told David Cameron put no pressure on the Culture Secretary to stand down.
Asked if Mrs Miller had been forced out of her job as the result of a media 'witch hunt', Mr Gove said: "I wouldn't criticise the press".
A Labour Party spokespersons has given this statement with regards to Maria Miller resigning as Culture Secretary:
– Labour Party Spokesperson
It is welcome that Maria Miller has finally done the right thing. By resigning she has recognised that the public expect and deserve the highest standards from politicians.
Labour said all along that you cannot have one rule for a Cabinet minister and one rule for everybody else.
That it came to this raises questions for David Cameron whose judgement has been found wanting. Yet again he has shown himself to be out of touch and a prime minister who only stands up for one of his own.
Maria Miller rang David Cameron to resign last night following a state banquet in honour of Irish President Michael D Higgins, ITV News Westminster news editor Samana Haq reports:
Maria Miller called the PM after State Banquet yesterday and said she had to step down. Spared him having to defend her at PMQs