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Clare Balding travels to South Korea to look ahead to the 2018 Winter Olympics in Pyeongchang. As well as meeting some of Britain's best hopes for a medal, including reigning skeleton champion Lizzy Yarnold and speed skating triple world champion Elise Christie, Clare catches up with Winter Olympic legends Jayne Torvill and Christopher Dean. While in South Korea, Clare also takes in the culture of the host nation and looks at the political tensions that will provide a backdrop to the Games.