History-making jockey Rachael Blackmore stunned the racing world by announcing her retirement from the saddle on Monday. The trailblazing jumps rider broke the news in a lengthy statement on social media, saying, “My days of being a jockey have come to an end.” Blackmore, 35, conquered nearly every summit in her sport. In 2021 she became the first female jockey to ride the winner of the Grand National when she struck on the JP McManus-owned Minella Times at Aintree.The historic achievement led