Great Britain win 4x100 relay after Usain Bolt pulls up injured

Great Britain's men's 4x100 metres relay team claimed a stunning gold medal amid chaotic scenes at the World Championships in London as Usain Bolt's glorious career ended in injury and agony.

The British quartet of CJ Ujah, Adam Gemili, Danny Talbot and Nethaneel Mitchell-Blake pipped the United States to gold in a world-leading 37.47 seconds, but only after Bolt had pulled up on his anchor leg and collapsed to the track.