The Royal Windsor Horse Show was one of Queen Elizabeth’s favorite annual events, and Duchess Sophie and her daughter, Lady Louise , have kept the family legacy going. The late Queen was often seen in a country-cool look of a quilted jacket and Hermès head scarf at the event, but 22-year-old Louise borrowed a look straight out of her cousin-in-law Kate’s closet on Friday, May 15. Lady Louise was spotted wearing the same ivory Holland Cooper sweater owned by the Princess of Wales as she arrived to work at the horse show. Princess Kate has worn the cozy Fair Isle sweater on several occasions, including a 2022 CBeebies appearance and a 2023 Instagram post promoting her Together at Christmas concert . Louise paired the $299 turtleneck with a wool coat and a checked Zara skirt, although she carried the sweater over her arm in one photo taken later in the day and appeared to be wearing a chambray blouse under her blazer. Lady Louise bundled up in a Holland Cooper turtleneck.…