There has been an increasing focus in the UK on the support provided to the Armed Forces community, with the publication of the Armed Forces Covenant (2011), the Strategy for our Veterans (2018) and the first ever Office for Veterans’ Affairs (2019). There is also an important body of research – including longitudinal research – focusing on transitions from military to civilian life, much of which is quantitative. At the same time, the UK has witnessed a period of unprecedented welfare reform. However, research focused on veterans’ interactions with the social security system has been largely absent. This article draws on the authors’ experiences of undertaking qualitative longitudinal research (QLR) to address this knowledge gap. We reflect on how QLR was essential in engaging policy makers enabling the research to bridge the two parallel policy worlds of veterans’ support and welfare reform, leading to significant policy and practice impact.

Qualitative longitudinal research can make a distinctive contribution to policy discussions and to the assessment of outcomes. This article draws on research with lone-parent families over fifteen years to illustrate how change and continuity can look different over shorter and longer time periods, to discuss presenting longitudinal qualitative evidence through the selection of case studies, and to explore some of the challenges of engaging in policy debates with qualitative data.