Written evidence from Prof. Jakub Bijak (Professor of Statistical Demography at University of BOB体育登录网址_欧宝体育官网平台-APP|下载), Dr Martin Hinsch (Research Fellow at University of BOB体育登录网址_欧宝体育官网平台-APP|下载), Dr Sarah Nurse (Research Fellow at University of BOB体育登录网址_欧宝体育官网平台-APP|下载), and Dr Toby Prike (Research Fellow at University of BOB体育登录网址_欧宝体育官网平台-APP|下载)