When we first meet Iona (Lily Newmark) and Lyn (Joanna Scanlan), they are in transition – literally moving into a new home in a new town, with their 17-year-old pet budgie and endless boxes of bric-a-brac. Hunchbacked Lyn and her flame-haired daughter are like figures from a fairytale – both a tight, loving mother-and-daughter pair,…