Europe generates real world health data (RWD) that has the potential to inform the development and evaluation of medicines and medical devices. However, multiple barriers remain that limit the access, analysis, interpretation, and use of RWD, hampering its use. Additionally, the limited uptake of existing guidelines for the generation and use of real world evidence (RWE) adds complexity in the use of RWD to inform decision making. The GREG consortium will leverage the learnings of previous and ongoing key RWE initiatives to fill these gaps by generating, pilot-testing, and disseminating evidence-based guidance and tools for the use of RWE to inform the development and evaluation of medicines, medical devices, and combinations. To achieve these goals, we will work with key stakeholders to iteratively test and improve our guidance and tools, backed by case studies from previous successful and unsuccessful examples. We will engage with the most relevant European RWE initiatives and access the largest network of RWD partners in Europe, namely the European Health Data and Evidence Network (EHDEN) through our partner, the EHDEN Foundation. Additionally, we will provide multi-stakeholder gatherings (including patient and public representatives) to promote the dissemination, adoption, and implementation of RWE for decision-making in Europe. Our public and private partners will co-create use cases working closely with key regulatory and health technology experts in bespoke fora. These will be used initially to evaluate existing guidelines, and later to pilot-test the GREG guidance and tools. Our outputs will include training for all involved stakeholders on the use of our guidance and tools, and practical templates to facilitate regulatory and health technology/payer submissions. Together, these will accelerate access to better medicines and medical devices for European citizens.