Is David Cameron's support for Sir David Nicholson wavering? In his reply, the Prime Minister failed to say he still has confidence in Sir David. He also said that other people responsible for failings should "consider their positions too," indicating that he believes Sir David is doing the same. "What I would say about David Nicholson is that he has very frankly and very candidly apologised and acknowledged the mistakes that were made," Mr Cameron said. I think it is an important point because I think that everyone has to think of their responsibilities with regards to the dreadful events that happened at the Staffordshire hospital, including the fact that part of the problem was people following a very top-down, target-led agenda which led to patient care being put on the back-burner. Now David Nicholson has made his apology and wants to get on with his job of running an excellent national health service and other people, frankly, should be thinking about their positions too. Downing Street sources suggested Mr Cameron was frustrated that nobody in a senior position in the NHS had resigned in the wake of the Francis Report. Asked whether Mr Cameron was displaying his frustration at the lack of resignations, a Downing St source said: "You could infer that from his comments but the thing has to take its proper course." Number 10 indicated that Mr Cameron still supported Sir David and would not say which other individuals should be considering their position. Sources declined to say whether Mr Cameron believed Andy Burnham, the last Labour health secretary who is now shadowing the role in Opposition, should consider resignation. However, Labour accused the Prime Minister of playing "party political games" with the Mid Staffs tragedy. A Labour source said Mr Cameron's comments were "shabby and cheap." Giving evidence to the Commons Health Select Committee yesterday, Sir David conceded he had been part of the culture that caused problems at Mid Staffordshire NHS Foundation Trust. However, he again insisted he would stay on and lead the health service through crucial reforms. "During that period, across the NHS as a whole, patients were not the centre of the way the system operated," Sir David said. However, he told MPs that the local health authority had "no idea" about the serious care failures at the trust, where patients were routinely neglected and as many as 1,200 could have died needlessly as a result of maltreatment and neglect. Last month's Francis report into the scandal found patients were left lying in their own urine and excrement for days, forced to drink water from vases or given the wrong medication. On February 20 while on a trip to India Mr Cameron gave his strong backing to Sir David. Mr Cameron said then: "David Nicholson, first of all I think he does a very good job. I've worked with him at close quarters since becoming Prime Minister. I'm impressed by the grip and grasp he has over the NHS and his knowledge, understanding and love for it and what he helps to deliver in terms of results. It seemed to me that he had properly apologised and acknowledged the mistakes the regional health authority had made when he ran it for that short period of time as these events unfolded. I would point you towards what the report said - which is that we should not be seeking scapegoats. And I think to highlight David Nicholson in that way would be seeking a scapegoat. I don't think he should be made a scapegoat. Will Nicholson keep his job?