Sian Blake: Former EastEnders Actress Missing The 43-year-old, who has not been seen for almost three weeks, is reportedly very frail and suffering from motor neurone disease. Sian Blake played the character Frankie Pierre in EastEnders Sian Blake, 43, who played Frankie Pierre in the soap, went missing from Erith, Kent . She was last seen on Sunday 13 December in Waltham Forest, east London, with eight-year-old Zachary and four-year-old Amon. Officers believe they are still in the London area - but Ms Blake also has links to Cambridge and Colchester. Zachary (left) and Amon are also missing Relatives have received text messages from her but she has not been seen since she went missing, the Metropolitan Police said. The force added: "Officers are increasingly concerned for Sian and the children's wellbeing." Ms Blake reportedly suffered from motor neurone disease and had been "looking very thin and frail" before she disappear...