My research takes a mixed-methods approach and is highly interdisciplinary in nature. It spans countries of all income levels, with considerable recent work undertaken in Malawi, Senegal and The Gambia, South Africa, and the United Kingdom. I am particularly interested in research that contributes to food system transformation, and that draws on understandings and methods from policy analysis and engages with the complexity of whole system change including in relation to climate. I also have an active interest in the conceptual and methodological development of policy analysis, such as for example through contributions to the conceptualisation of actor power and other aspects of the policy process.

I am principal investigator for a work programme funded by the European Union and German Federal Ministry for Economic Cooperation and Development which focuses on food system transformation in low- and middle-income countries, aiming to bring fresh perspectives to understanding how to achieve healthy and sustainable diets. I have also been principal investigator and co-investigator on a number of other studies, including two programmes of work funded by the Drivers of Food Choice Competitive Grants Program (Bill and Melinda Gates Foundation, and UK Foreign, Commonwealth & Development Office). One of these for which I was principal investigator in collaboration with colleagues at the University of Malawi and SOAS University of London, examined the impact of Malawi's agricultural input subsidy programmes on food choice and dietary diversity. I am also currently co-investigator of a programme of work relating to migration and cross-border healthcare use in West Africa.

I am also a co-author of the new edition of 'Making Health Policy' for the Open University Press, published in 2023.

I am based within the Health Policy and Systems Unit at LSHTM, and lead the Political Economy of Health and Health Policy (PEHHP) research group.