Julie Bailey, founder of campaign group Cure the NHS told Daybreak that NHS boss Sir David Nicholson is "ultimately responsible" for what happened at Stafford Hospital.
She said, as former Chief Executive of the strategic health authority, what happened at at Stafford Hospital happened "under his watch".
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The Islamic centre where the Manchester suicide bomber is thought to have prayed says the attack "has no place in Islam or any religion".
German chancellor Angela Merkel and Indian prime minister Narendra Modi among those to praise "great spirit" of Manchester people.
The bomber's identity has been confirmed by Greater Manchester Police.