Louise Minchin introduces highlights from Nottingham, where double Olympic medallist Jonny Brownlee led the Great Britain team for the inaugural World Series mixed relay event. Brownlee was part of a four-strong mixed-gender team. Mixed relay will make its Olympic debut in 2020, and the race in Nottingham was the first of three World Triathlon Series events this year in which the best teams in the world are aiming to amass enough points to qualify for the games in Tokyo.