Simon Restarick

In the novel Third Girl, Simon Restarick was the elder of two sons of James Patrick Restarick. He kept the family firm going after his father's death. Some two years before the events in the book, he suffered from coronary troubles and his health declined. He subsequently died of coronary thrombosis about a year later. His younger brother of Andrew took over the firm.

Simon is described as a "perfectly plain type of shrewd businessman". His uncle Roderick Horsfield like him better than his younger brother, he thought he was "a steady chap" but "deadly dull". Simon had married a "social wife" but they had no children.