My research spans both Atmospheric Chemistry and Astrochemistry. For Earth’s atmosphere, we aim to improve the accuracy of chemical mechanisms contained in numerical models which are used to predict future changes in climate change and air quality, and which drive all legislative controls on emissions. The future well-being of Earth’s atmosphere relies on a detailed understanding of the chemistry responsible for the oxidation of man-made and natural emissions. Further afield, over 200 molecules have now been observed in space, for example in dense molecular clouds and other interstellar environments, and we aim to understand the chemical pathways leading to their formation and destruction. We focus on the kinetics of gas-phase reactions of radical species with complex organic molecules (COMs).