London: UK Prime Minister David Cameron on Monday said serious mistakes had been made by Defence Secretary Liam Fox, who has been under fire for the activities of one of his aide.
Adam Werritty called himself an adviser to Fox and accompanied him on a visit to Sri Lanka and in meetings without having any official position in government.
However, no decision on Fox's continuation in office is likely to be made before Cameron receives the full report of the inquiry into the row, expected on October 21.
Cameron's spokesperson on Monday said: "It is clear, as Liam Fox himself said on Sunday, that serious mistakes were made in allowing the distinction between professional responsibilities and personal loyalties to be blurred - and this has clearly raised concerns about impropriety and potential conflicts of interest".
Fox also apologised to MPs and said it had been a "mistake to allow distinctions to be blurred between my professional responsibilities and my person loyalties to a friend".
The spokesperson said that while the initial conclusion was that no classified or other defence-related official information was discussed with, or given to Werritty it was clear "much tighter procedures" were needed in the department to make sure the Ministerial Code was adhered to.
In a statement in the House of Commons, Fox said he met Werritty 22 times - more than previously stated - at the Ministry of Defence and 18 times on foreign trips and added that such meetings and trips with Werritty would now end.