ExPEDite’s approach is to develop and integrate modular components that can be used to analyse and predict the energy performance of a district under various “what-if” scenarios. These components form a district Digital Twin, enabling not only visualisation of the built environment, but also real-time information on energy flows and spatio-temporal optimisation of the district’s energy needs. This tool allows district planning actions to be designed, analysed and compared, leading to evidence-based decision making.