British director Elizabeth Sankey bravely recounts her story of frightening isolation and unwanted thoughts after childbirth in her spellbinding documentary "Witches", which is out on Mubi. The film features interviews with medical professionals, historians and fellow sufferers, and uses old film footage showing pop cultural representation of witches. The director speaks to Eve Jackson about her own experience in a mother and baby psychiatric ward and shares her perspective on how women with mental health issues have been stigmatised and misunderstood over time.