In a statement issued on his behalf last week by the stable, Al Zarooni said he had made a "catastrophic error" in administering the drugs.

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"This catastrophic error of judgment - hiring Andy Coulson, hanging on to him too long - directly contributed to the position Sir Paul found himself in and his decision to resign, " said Mr Miliband.

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Several years ago, I myself was the victim of a pharmacy error that could have had catastrophic consequences.

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