By Charlotte Tutton EastEnders will air the arrival of two new characters next week, as Walford residents say farewell to another. Aunt Sal’s sad passing brings the Mitchells together next week, as they attend her funeral. The Mitchells will find out about Sal’s death in upcoming scenes, after actress Anna Karen’s death last February. The soap favourite tragically passed away aged 85 in a house fire at her home. Next week, the soap honours the actress and pays tribute to her and her iconic character at Sal’s funeral. The service sees the arrival of Sal’s husband Harold Martin, played by actor …