Wed 13 Mar, AT 08:56
But Cameron's health tsar is more positive, saying new culture can make NHS the world's safest
Wed 6 Mar, AT 15:55
David Cameron has consistently backed embattled NHS chief - but his support may now be 'wavering'
Thu 7 Feb, AT 09:38
New investigation into care at UK hospitals ups pressure on beleaguered NHS chief to step down