Blackmore led home a one-two for trainer Henry de Bromhead, winning at 11-1 from 100-1 runner-up Balko Des Flos.
Hannah Cockroft has told ITV News of how the DofE Award has helped her to excel in her career as well as push her outside of her comfort zone.
It comes amid claims that social media tech giants are not doing enough to stamp out racism on their platforms.