Greg took a training session at the Eldon Square shopping centre as part of the launch event.
He won gold at London 2012 long jump and says now it's his turn to inspire others.
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Skipton & Ripon is a large rural seat that includes the western part of the Yorkshire Dales an two of the Yorkshire three peaks.
This seat was the constituency of the former Prime Minister Tony Blair, who represented the area between 1983 and 2007.
Gales continuing during Tuesday with heavy showers, wintry over hills. Wintry showers and clear spells bring the risk of ice overnight