Gareth Horton has over thirty years’ experience in aircraft and engine analysis and consultancy at industry, national and international level. As a member of different ICAO-CAEP (the Committee on Aviation Environmental Protection) and SAE Working Groups, Gareth has contributed to the development of guidance on methods for calculating emissions from aircraft engines and the assessment of future regulations for aircraft and engines. Gareth provides support to European Commission agencies on the development of a new aircraft CO2 Standard under ICAO-CAEP, covering both the technical aspects of aircraft emissions and the economic modelling within the CAEP Cost Effectiveness study leading to the CAEP meeting in early 2016. Gareth was heavily involved in the ICAO-CAEP NOx Stringency and Environmental Goals analyses for the 2010 CAEP meeting, applying an aviation greenhouse gas model to a range of options and scenarios. Gareth has developed advanced methods for the calculation of emissions and produced advice for UK Government departments on emissions modelling and future aircraft technology and he has led the development of future aircraft technology and performance modelling in projects such as an aviation Marginal Abatement Cost Curve model for a UK Government department. He led the Ricardo input to the European TEAM_ Play project, developing a flexible future fleet and operations forecasting model as part of the demonstration of a pan-European aviation environmental modelling capability.