Amol Rajan and guests look at why British birth rates have declined so much. Can we - should we - try to reverse this and how will we pay for the health and care needs of our growing elderly population? GUESTS Prof Sarah Harper, Director and Clore Professor of Gerontology, Oxford Institute of Population Ageing Miatta Fahnbulleh, CEO, New Economics Foundation Robert Colvile, Director, Centre for Policy Studies David Runciman - Professor of Politics, University of Cambridge Presenter: Amol Rajan Producer: Rob Walker Editor: Kirsty Reid