The Sheffield Dementia Alliance, responded to a new report by the Lancett Commission, is advising on lifestyle changes that can prevent the incidence of dementia. According to scientists around one third of dementia cases are preventable through improved life choices including continuing education, exercise and addressing middle-aged obesity, high blood pressure and hearing loss. It is estimated that 1.2 million people in England and Wales will be living with dementia by 2040, a 57% increase from 2016 figures largely driven by people living longer. Sheffield Live! reporter Simon Thake spoke to Katherine Mary Horner from Sheffield Dementia Alliance.