Energy Systems Catapult offers expertise in National Energy System Modelling and Analysis, which draws on the internationally peer reviewed Energy System Modelling Environment (ESME) tool to inform and support energy strategy and planning policy for Government and industry. ESME is a least-cost optimisation model designed to explore technology options for a carbon constrained energy system, subject to additional constraints around energy security, peak energy demand and more. The ESME model was originally developed by the Energy Technologies Institute (ETI), an industry and government funded research institute into low carbon energy system planning and technology development to address UK energy and climate change targets. ESME has developed into one of the most powerful energy system models for the UK, with the outputs and insights from the modelling used across a variety of contexts. ESME covers the power, transport, buildings and industry sectors, and the infrastructure that underpins them, in five year time-steps from 2010 to 2050. This set of scenarios is Clockwork, well co-ordinated centrally planned long-term energy infrastructure. For more information, please read the documentation attached, or the data reference manual at ESC's website: https://es.catapult.org.uk/brochures/esme-data-references-book Please note: if you open the file and nothing appears, navigate to "view" on the taskbar and click "unhide".