She said the warmer temperatures (near 68 degrees by race end) helped her improve over last year’s performance. "Last year, I ...

Youth Demand said two of its supporters jumped over the barriers and threw the substance in front of the men’s elite race at around 10.35am.

More than 56,000 participants are expected on the 26.2-mile course through the capital on a warm, dry day with temperatures of up to 22C.