In this special series of Change Makers, host Michael Hayman meets the business owners delivering positive impact for their people, their communities and the northern economy: leaders driving growth in unexpected places and sectors, nurturing skills for the future, leveraging innovation strategies, investing in nature, and fostering inclusive social change. In this episode, Oonagh Simms, Founder of the Marshmallowist, shares how her story began training as a chocolatier in Paris. From a Portobello market stall to Harvey Nichols, Vogue and a move back to Leeds, she explains the craft and chemistry behind luxury marshmallows, working with her sister, and why flavour layering is redefining modern confectionery.