Politicians love talking about supporting families. But, asks Jo Fidgen, do they understand modern family life? And how far can or should the state change the way families live? There's endless focus on young children and childcare, while family care for the elderly is rarely mentioned. She hears from policy insiders, those who have to define families to make their businesses work, individuals facing extraordinary challenges as family life changes with society and across the generations. Producer: Chris Bowlby Editor: Hugh Levinson.