Jacob Shaw¹, Grant Allen², Joseph Robert Pitt², Prudence Bateson¹, Adil Shah¹, Patrick Barker¹, Langwen Huang¹, Shona Wilde³, Ruth Purvis³, Alistair C Lewis^4,5, Rob Ward⁶, Pamela Dominutti⁷, Stuart Young⁸, James D Lee^3,5, Max Coleman⁹, James L France⁹, Rebecca Fisher⁹, David Lowry⁹, Nicola J Warwick¹⁰, Alexandra Weiss¹¹, Anna E. Jones¹¹ and Tom Lachlan-Cope¹¹, (1)University of Manchester, Manchester, United Kingdom, (2)University of Manchester, Manchester, M13, United Kingdom, (3)University of York, Department of Chemistry, York, United Kingdom, (4)University of York, Wolfson Atmospheric Chemistry Laboratories, York, United Kingdom, (5)National Centre for Atmospheric Science, York, United Kingdom, (6)British Geological Survey Keyworth, Nottinghamshire, United Kingdom, (7)Wolfson Atmospheric Chemistry Laboratories, University of York, York, United Kingdom, (8)Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (9)Royal Holloway, University of London, Egham, United Kingdom, (10)University of Cambridge, Cambridge, United Kingdom, (11)NERC British Antarctic Survey, Cambridge, United Kingdom