Royal Opera House, LondonThe ballerina brings an illusion of spontaneity to the choreography while mining a wealth of emotion from this gothic ghost story's fantastical plotFrancesca Hayward, in her first official performance of Giselle, is nothing less than exquisite. The lightness of her jump corresponds to the luscious melt of her plié; the sensitivity of her phrasing responds to all the light, shadow and nuance …