Parents of Alfie and Harry McQuillan describe what happened when they discovered the overdose of morphine had been given.
One twin was given ten times the recommended dose while the other twin was given 17 times the normal dose.
Both died soon after the drug was given.
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Officers were called to the village of Hurley, Warwickshire, after the "angry" bird tried to bite a retired policeman's dog on Tuesday.
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Birmingham athlete Kelly Sotherton has had her stolen gold medal returned to her- less than 24 hours after the case featured on a TV appeal.