Tereza Kamenikova, Lancaster University, Lancaster Environment Center, Lancaster, United Kingdom, Mark Hounslow, Lancaster University, Lancaster, United Kingdom, Courtney Sprain, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, Matic Rifl, Charles University, Prague, Czech Republic, Annique van der Boon, University of Liverpool, Liverpool, United Kingdom and Andy Biggin, Geomag lab, University of Liverpool, Liverpool, United Kingdom