Eleven police witnesses to the shooting spent eight and a half hours writing their statements in the same room of CO19 HQ a few days after the incident.

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Of course its usefulness depends on being able to access a re-charging unit which can take between two and a half to eight hours.

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Carina Trimingham spent two-and-a-half hours with Huhne, who is serving an eight-month sentence for getting his then-wife to take speeding points on his behalf in 2003.

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