Dr. Paul Chadwick is an Associate Professor and Deputy Director of the UCL Centre for Behaviour Change where he works on the development of interdisciplinary approaches to research and practice in behaviour change. Paul has been at the forefront of developing, evaluating and disseminating evidence-based approaches to obesity and diabetes management in the UK and internationally and works on several large-scale trials of behaviour change interventions funded by the CDC and NIHR. More recently he has been developing methods to integrate systems and behaviour change theory and testing their application to transform complex systems such as those involved in energy, biodiversity, food and equality for individuals of Black and Minority Ethnicities. In 2019 Dr Chadwick was commissioned by the Welsh Government to use the Behavioural Systems Mapping methodology to develop its decarbonisation strategy for Welsh Homes, and has applied the methodology to a range of health, well-being and sustainability issues including; reducing sexual harassment in academia and developing whole systems approaches to physical activity in local government.