In her first individual outing of the season, Yemi Mary John has produced the unexpected. In Tokyo, at the Seiko Golden Grand Prix, the 23-year-old British athlete became only the ninth woman in United Kingdom history to run under 50 seconds for the 400m thanks to a stunning 49.85 performance. It was a major breakthrough for the 2022 World U20 champion, who also recorded the fastest European time of the year and the fifth-best mark in the world this season. Above all, the race further confirmed that the current depth of British women’s 400m running is probably the strongest it has ever been.