Vi Cottrell never expected she'd end up running a chocolate factory. But in the 1970s she and her husband, Richard, left a comfortable existence in Christchurch, believing there must be more adventures to have. After two years working with Tibetan refugees in India, they returned home to set up Trade Aid, a pioneering fair trade movement and retail network, selling goods from around the world. Their latest venture is an organic, fair trade chocolate factory in Christchurch. Vi takes Katy Gosset on a tour.