BBC Sport - World Swimming Championships: Britain win 4x100m gold

Britain win 4x100m world gold

Great Britain's team of Chris Walker-Hebborn, Adam Peaty, Siobhan-Marie O'Connor and Fran Halsall win the mixed 4x100m medley relay with a world record time of three minutes 41.71 seconds at the World Swimming Championships in Kazan, Russia.

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