A four year old boy is being treated at Frenchay Hospital near Bristol for serious head injuries after a crash on the A3072 near Holsworthy.
He and a 32 year old woman were in a car, which overturned on the road. She sustained back injuries.
Police would like to hear from anyone who saw the accident, which happened between Weekstone Cross and Weekstone Cottage just after 1pm on Saturday afternoon.
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Panels of cladding have been removed in Plymouth after being given the worst fire rating under new safety guidelines.
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One or two showers on the way, although not too heavy. Breaks of sunny spells but cloud developing through the afternoon.