Abstract In this session, the authors and audience have the opportunity to engage in discussions around health policy integrity and reform implementation. Introducing and implementing health system reform has been a perennial issue for countries around the world over the past number of decades. Recently, the introduction and implementation of Universal Health Coverage (UHC) has been of particular focus, with 193 countries committed to introducing UHC by 2030. At the same time, European countries that previously established national health systems are introducing new reforms in the hope of making their health systems more efficient and equitable. However, there are a number of challenges along the path of policy development and implementation with which all countries must grapple, and how individual countries go about reforming their health systems depends on their social, political, cultural and economic contexts. Learnings from around the world have highlighted that reforms can be challenged or stalled in both the design and implementation phases. This workshop, which conceptualises implementation as the “acid test” of a policy, thus explores, through three case studies, the factors that facilitate or challenge the implementation of reforms. At the same time, we discuss policy integrity, exploring reasons for why policies pivot away from original design and intent. Furthermore, we discuss the implications of health reform on equity, cognisant that the primary objective of this collective reform work is to reduce the financial burden of healthcare on households and improve access. The first presentation will provide the framework for audience discussions, outlining international lessons in relation to UHC reforms and equity. The second presentation will provide a snapshot of the Finnish experience of introducing a “big bang” structural reform. The third presentation highlights lessons from the Portuguese experience of primary healthcare reforms, the opportunity these offer for creating patient-centred care and the integral role that politics and governance play in the reform process. Finally, the Irish case study highlights the experiences of a High Income County attempting to introduce UHC much later than its European counterparts, and negotiations between the public and private sectors. Through this, we hope to hold the tensions and stimulate debate about policy robustness and resilience, and reform implementation. Each presenter will be given a strict deadline of 10 minutes each by the chair and then the audience will be invited to debate the problems identified and strategies proposed to discuss: (i) what are the facilitators and barriers to reform implementation, (ii) what are the factors that encourage policy integrity and change and (iii) whether greater cooperation across Europe regarding health reforms can be more effective in supporting robust health systems. Key messages • For reforms to be facilitated, there must be cohesion and commitment across the political, social, economic and cultural systems, and no fragmentation across health system functions. • As policy implementation is attempted, there is a tension between remaining true to key values and adapting to new circumstances.