Bullwood Hall Prison at Hockley in Essex is among six prisons that will close, the Government has said.
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After a mostly dry start with some sunny spells, but thickening cloud and scattered showers will spread from the west later.
The region is still recovering after a battering by winds of up to 75 miles an hour and the disruption is set to continue until tomorrow.
Cambridgeshire police have been criticised by a coroner over the handling of the death of a pensioner in her home in Wisbech.