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Tim Warwood introduces highlights of the World BMX Championships from Medellin, Colombia, where places for this summer's Olympics are up for grabs.

The British team is led by Liam Phillips, who is looking to reclaim the title he won in 2013. He is joined by teammate Kyle Evans, who finished on the podium of a World Cup event for the first time in April when he came second to Phillips in Manchester.

Commentary comes from Simon Brotherton and six-time Olympic champion Sir Chris Hoy.