In February and April 2021, HDR UK conducted a programme of consultation to inform the design and function of Population Research UK. The purpose was to: • Understand current experience, what works well and challenges in the current UK LPS research ecosystem that reduce the efficiency and effectiveness with which LPS are utilised to deliver useful insights. • Define the roles that PRUK could play to reduce or eliminate these obstacles and improve the utilisation of LPS in the UK The consultation included: • A programme of 67 interviews. Interviewees had experiences of both running LPS and using LPS data and were selected from within and outside academia. Interviews included people in early, mid and senior stages of their careers, and people whose interest is primarily in the social sciences (27) (SS) and health sciences (40) (HS). • An online survey. There were 216 respondents and 107 complete survey responses. Respondents were predominantly UK academic audience that was broad across geography, numbers of years experience in working with of Longitudinal Population Studies (LPS) and disciplinary background