GB revel in 'fantastic' golden win

Perri Shakes-Drayton says she just "went for it and ran my legs off" in the final lap as she sprinted home to secure gold for the women's 4x400m relay team.

Shana Cox, Nicola Sanders, Christine Ohuruogu and Shakes-Drayton set a world-leading time of 3:28.76 to just edge past the US. Russia won bronze.

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