The Welsh global diaspora is estimated to be more than three million people, spread all over the globe – a similar number to the population living within Wales - but why do people leave Wales and on what basis might they return? Julia Gillard, former Australian prime minister and Welsh emigrant, delves into the issue with Dr Sarah Louisa Birchley, a specialist in global diaspora entrepreneurship. They discuss the motivations behind Welsh migration and what measures could be taken to encourage people to remain and contribute to the future of Wales. In conversation with the writer, television and radio presenter and producer, JonGower.