Royal expert Rafe-Heydel Mankoo has blasted the Duchess of Sussex for her latest announcement that she will be launching a cooking show. The new series is set to celebrate the joys of cooking, gardening, entertaining, and friendship. Speaking to GB News he said: “I know it’s not friendship and family because obviously family is not one of her strong points. “When did celebrities start taking over the roles of experts? “In the old days, you’d have Monty, Don, Alan Titchmarsh doing gardening, you’d have Rick Stein or Jamie Oliver doing cooking. “It was nice to have professionals doing these sort…