Great Britain's men & women qualify for 4x400m relay finals
Great Britain's men's and women's 4x400m relay teams qualify for the finals on Sunday at the World Championships in Beijing.
The men's team of Rabah Yousif, Delanno Williams, Jarryd Dunn and Martyn Rooney won their heat in a season's best time of two minutes 59.05 seconds.
The women's team finished second in their respective heat, the quartet of Eilidh Child, Anyika Onuora, Kirsten Mcaslan and Seren Bundy-Davies also setting a season's best time of three minutes 23.90 seconds, to secure automatic qualification for the final.
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