‘Every family has silences’: Kathryn Hunter on despair, desire, dislodgeable limbs – and her acting genius

She has played King Lear, all three witches in Macbeth and an ape turned variety performer in Kafka’s Monkey. As she prepares for a new show, she discusses the soaring highs and deep lows of her extraordinary lifeKathryn Hunter pulls off her black beanie and sits down. She hates having to keep still: “It’s torture.” On aeroplanes, she is always…