Asked whether he planned to fight on for his proclaimed innocence, Sergeant Nightingale said he had to ask the question: "Realistically can we keep going?".
He said that he had concerns about the "longevity of the family".
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Robert Gropel asked his wife while he hiked to the peak after she became ill, not realising she had altitude sickness that would prove fatal
Severe weather warnings have been issued as up to 60mm of rain is set to fall within just a few hours in some parts.
Tuesday: A cloudy, cool and dull day with outbreaks of heavy rain becoming lighter and patchier.