Great Britain's men's and women's 4x100m relay teams comfortably qualify for the finals at the World Championships in Beijing.
The women's quartet of Asha Philip, Jodie Williams, Bianca Williams and Desiree Henry finished second in their heat behind Jamaica, in a season's best time of 42.48 seconds.
The men's team of Richard Kilty, Harry Aikines-Aryeetey, James Ellington and Danny Talbot also finished second in their heat to claim automatic qualification. The race was won by a strong US team featuring Justin Gatlin.
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