A 22-year-old man who was also arrested on suspicion of murder is undergoing treatment for injuries sustained before his arrest.
He remains under police guard in hospital.
A 49-year-old woman held suspected of murder was this week freed on police bail and is due to return to Woking Police Station on August 29.
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Philippa has the latest weather for the east
Philippa has the latest weather for the west
Arctic temperatures are forecast this week, with the Met Office warning of blizzard conditions in the south on Thursday