His cardiovascular outcomes research was originally based on local data collections in east London before it moved on to the UK’s cardiovascular registries which, through linkage with primary care records, have provided a national perspective on the patient journey through a range of cardiovascular phenotypes. The chest pain clinic he introduced was service model for the NSF and changed practice by spawning a nationwide clinic network. He chaired NICE guideline groups on investigation of stable chest pain (2010) and management of angina (2011), was former Editor of Heart (2006-2013), and is the founding Editor-in-Chief of the European Society of Cardiology’s journal of Quality of Care and Cardiovascular Outcomes.