Banting memorial lecture 2025: Aligning clinical practice, policy and research

National clinical leadership, on a background of clinical practice and clinical research, provides unique perspectives. I have focused the Banting Memorial Lecture 2025 on the implementation of national programmes across England since 2013, for which, along with colleagues at NHS England, I successfully made the case for investment, led the implementation of interventions applied at scale across the country and used routinely collected healthcare data to demonstrate clinical effectiveness in the real world. Through specific examples of implemented programmes, including the NHS Diabetes Prevention Programme and the NHS Type 2 Diabetes Path to Remission Programme, I highlight important fundamental principles when making the case for, and implementing, national policy. First, ensure granular data collection to support evaluation and exploit data linkages to harness the power of real-world datasets. Second, where good evidence exists, implement evidence-based policy; where good evidence does not exist but political pressures to implement are being brought to bear, pilot and evaluate. Third, when the opportunity arises, rapidly translate new high-quality evidence into policy and practice. And fourth, support and protect the workload of healthcare professionals, particularly of those working in primary care. Then, through an epidemiological lens, I highlight: how the COVID-19 pandemic further unlocked the potential of national routinely collected electronic healthcare datasets; how, through application of these datasets, it has been possible to demonstrate improvements in diabetes complications and mortality through routine care delivery; and how it has been possible to demonstrate the next epidemiological transition in the global diabetes epidemic to multimorbidity/multiple long-term conditions.