Live coverage of the World Half Marathon Championships. Some of the world's best distance runners descend on Cardiff for the 22nd edition of the championships which are returning to the UK for the first time since 2009.
Britain's double Olympic champion Mo Farah makes his debut in the event as he continues his preparations for Rio 2016. He will be up against Kenya's reigning world champion Geoffrey Kamworor and Eritrean world record holder Zersenay Tadese, while Kenya's Gladys Cherono attempts to defend her title in the women's race.
Commentary by Steve Cram and Paula Radcliffe.
This is a live BBC One stream due to start at 13:30 GMT.
Available to UK users only.