Legal 'gag' prevents NHS whistleblower revealing more

Mr Walker has urged MPs to help him expose further details, saying he could not say more "without incurring a much bigger risk of being sued by the NHS".

"I am still gagged. There's nearly 3,000 pages of evidence of which I have only been able to talk about a few. Those are the things I would like the health committee to expose," he said.

The BBC reported that Mr Walker had been threatened with legal action because of the interview.

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NHS whistleblower speaks out

The former head of an NHS trust which is being investigated over high mortality rates has spoken out over patient safety concerns - in defiance of a legal gag.