Samuel Wharton, University of Leicester, Leicester, LE1, United Kingdom, Jonathan Rae, University College London, Mullard Space Science Laboratory, London, United Kingdom, Jasmine Kaur Sandhu, University College London, Mullard Space Science Laboratory, Dorking, United Kingdom, Maria-Theresia Walach, Lancaster University, Lancaster, United Kingdom, Darren M Wright, Univeristy of Leicester, Leicester, United Kingdom and Timothy K Yeoman, Univ Leicester, Leicester, United Kingdom