The prime minister will receive an interim report later into the working relationship between Defence Secretary Liam Fox and his friend Adam Werritty. On Sunday Mr Fox denied any wrongdoing but admitted making mistakes and apologised to David Cameron. Mr Fox, who set up the Ministry of Defence inquiry into his conduct, will make a statement to MPs later. Mr Werritty, who has no government role or national security clearance, sat in on several meetings with Mr Fox. The 34-year-old, who was Mr Fox's best man in 2005 and a former flatmate, also used to carry cards describing himself as an adviser to "the Rt Hon Liam Fox MP". The initial findings of the inquiry will lay out the facts of the case to Cabinet Secretary Sir Gus O'Donnell, who will then make recommendations. The BBC has been told the prime minister will consider the interim report but will not make a final decision on Mr Fox's future until he sees the full report due on 21 October. In his statement, Mr Fox admitted it had been "a mistake to allow distinctions to be blurred between my professional responsibilities and my personal loyalties to a friend". Mr Fox said that at no stage had he or his department provided classified information or briefings to Mr Werritty, who visited him a number of times at the MoD, or assisted with his commercial work in the defence industry - "let alone benefit personally from this work". "Nevertheless, I do accept that given Mr Werritty's defence-related business interests, my frequent contacts with him may have given an impression of wrongdoing, and may also have given third parties the misleading impression that Mr Werritty was an official adviser rather than simply a friend," he said. The BBC's political editor Nick Robinson said a main source of information in this story had been involved in a complex and bitter legal case in the US courts, and it would have been impossible for the government to analyse all the information available over the weekend. He said the prime minister would therefore have to make a political judgement on whether to keep Mr Fox. Shadow Defence Secretary Jim Murphy said a weekend inquiry into years of allegations was not good enough. "If David Cameron tries to clear his cabinet colleague today then it's obvious that someone at number 10 has spent the weekend down at B&Q and buying enough paint to organise a whitewash." He said Liam Fox's "partial apology" had been a "tacit admission" that he had broken the ministerial code. Conservative MP Greg Hands said Mr Fox had made a "very full and frank admission of things that did go wrong", which should be taken "at face value". He said nothing illegal had happened and there had been no breaches of national security. He added: "There's a lot of background to this case in the United States between a major corporation and a private equity firm and there is actually quite a bad smell about some of the briefing against Liam Fox that's been going on." Another Tory MP, Patrick Mercer, said he was concerned the affair would not go away quickly at a time when the armed forces needed a "capable and undistracted" defence secretary. A series of newspaper revelations over the weekend increased the pressure on Mr Fox since he set up the inquiry on Friday: * A video from a Sri Lankan TV broadcast emerged that showed Mr Werritty at a meeting the Sri Lankan president had with the defence secretary in London last year, although the MoD said Mr Fox had attended the meeting with Mahinda Rajapaksa in a private capacity * Email correspondence published by the Guardian called into question Mr Fox's claim that a meeting with defence industry businessmen in Dubai had been impromptu - suggesting, rather, that Mr Werritty had been involved in planning the discussions for some time. On the Dubai meeting, which was said to have been brokered by Mr Werritty, the defence secretary said it had been "wrong to meet with a commercial supplier without the presence of an official". "I have apologised to the prime minister and agreed with my permanent secretary to put in place new procedures to ensure that this does not happen again," he said. He pledged to answer "all questions" in the House of Commons.