Grant Allen¹, Joseph Robert Pitt¹, Keith Bower², Tom Bannan², James D Lee³, Patrick Barker², Prudence Bateson², James R Hopkins⁴, Rebecca Fisher⁵, David Lowry⁵, Dominkika Pasternak⁶, James Lawrence France⁵, Hugh Coe², Michael Christopher Daly⁷, Euan G Nisbet⁵ and Shona Wilde³, (1)University of Manchester, Manchester, M13, United Kingdom, (2)University of Manchester, Manchester, United Kingdom, (3)University of York, Department of Chemistry, York, United Kingdom, (4)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (5)Royal Holloway, University of London, Egham, United Kingdom, (6)University of York, York, United Kingdom, (7)University of Oxford, Earth Sciences Dept, Oxford, United Kingdom