The Energy Space Time group carries out research into the design and application of sustainable energy systems, whole system integration in space and time. Our activities range from theoretical investigations to implementation research, and the development of in-house models. Some of these models are commercialised and licenced to users, including National Grid and Western Power Distribution. Our research activities and capabilities include: • energy space and time modelling of city, national and international scale energy systems • whole systems integration: electricity, thermal, fuel systems, energy storage • reliability and security of coupling gas and electricity networks • data and modelling: programmes for collation and processing of diverse datasets for input to models and for validation. The use of GIS for modelling, data management and display • bespoke software for optimisation, simulation