There were almost 10,000 unexplained extra deaths among people with dementia in England and Wales in April, according to official figures that have prompted alarm about the severe impact of social isolation on people with the condition.

The data, from the Office for National Statistics, reveals that, beyond deaths directly linked to Covid-19, there were 83% more deaths from dementia than usual in April, with charities warning that a reduction in essential medical care and family visits were taking a devastating toll.