Margaret Adeoye not impeded by Veronica Campbell-Brown

She had started in the fifth lane.

Jamaica’s Usain Bolt, left, and South Africa’s Anaso Jobodwana laugh after finishing a men’s 200m semifinal at the World Athletics Championships at the Bird’s Nest stadium in Beijing, Wednesday, August 26, 2015. The British sprinter, who also advanced to the event final, told BBC Sport after the race, “She helped me get to the finish line so I’m not complaining”.

“That’s not happened to me before. I just wanted to get as close to her as possible, because I knew she’d probably get DQed”.

Despite the huge error, Campbell-Brown was not punished.

IAAF rules dictate Adeoye’s trespasser progresses to the next round, because she crossed lanes “in the straight with no material advantage being gained, and no other athlete being jostled or obstructed so as to impede his or her progress”. It was deemed that because Adeoye was well behind, the mishap had caused no harm.

Away from the earlier controversy, Britain’s Dina Asher-Smith put up a sensational performance to set the fastest time of the heats, running a personal best 22.22s in winning the final heat.

Asher-Smith is not doubling up in Beijing, though, and is focusing on half-lap success a year out from the Olympics. “I feel fine now and hopefully tomorrow I won’t need [leggings]”.

“The three who won gold have inspired us”.