Ashley Allen via Getty Images One to watch: Dina Asher-Smith Why? Dina is undoubtedly one of the most exciting British athletes around today. Not only is she the first British woman to win a gold medal for sprinting at the World Athletics Championships (which she managed in 2019), she’s also the fastest woman in British history. Advertisement She’ll be competing in both the 100m and 200m sprints – and could well be about to be named the fastest woman in the world. When? Set your alarms, folks – the 100m heats are at 3.40am UK time on 30 July, while the 200m heats are on August 2 at 2.30am.