NHS chief executive Sir David Nicholson has told MPs that when he held senior posts in at Mid Staffordshire NHS Trust, he was unaware of the failings happening at the trust.
He said: "I had no idea...As shocking as it is, that is the truth. It's not to say there wasn't any information around in the health care system before I got there and by other organisations. We did not, in the NHS, at that time, a culture of sharing information across the system."
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