Ruth is a clinical epidemiologist, who trained in paediatrics. Currently, she is the Co-Director of the Children and Families Policy Research Unit and she is Theme Lead for Public Health within Health Data Research London. Until recently, she was Deputy Director for the Administrative Data Research Centre for England, where she developed research initiatives involving cross-sectoral linkages between health and non-health data and established a record linkage methodology group. Both these streams of work are ongoing, for example, with a Wellcome funded project to address uncertainty in multi-source linkages. Health to non-health, cross-sectoral linkages currently include health and health registry data linkages to education, social care, family courts and census, and a NIHR-funded project linking multiple data sources for teenage mothers and their children.