Health Secretary Jeremy Hunt told ITV's Daybreak that two unpublished reviews, seen by the Guardian, that allegedly detail substandard levels of care at Tameside General Hospital posed a "very serious issue".
Mr Hunt said he was doing "an enormous amount" to stop poor care in hospitals pointing out a "tough new inspection regime" that will be introduced this year.
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The dad of Luke Jenkins, who died at Bristol Royal Hospital's children's cardiac unit labelled an NHS England review a 'tick-box exercise'.
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