Rebecca Achieng Ajulu-Bushell (15:15 BST) - Regrettably, this event has had to be cancelled.

Rebecca Achieng Ajulu-Bushell was once a double British Champion and the first Black woman ever to swim for Great Britain. Ex-elite athlete Ajulu-Bushell explains why, in the run up to the 2012 London Olympics, she walked away from it all at the age of 17 after reaching such heights in her career and despite her singular love of the water. She reveals the true cost of excellence in sport.

Her memoir These Heavy Black Bones lays bare the pressures within the swimming world as she reflects on what she gave up; missing the ecstasy of peak physical performance achieved as her body and mind were sharpened through gruelling training, but with no regrets about escaping the press scrutiny, bullying and separation from normality endured during the harshness of adolescence.

Since then, she has graduated from Oxford and recently became CEO of the 10,000 Interns Foundation that champions under-represented talent in Britain.

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