Mark Turner is Senior Lecturer at Manchester Metropolitan University, UK, and the author of The Safe Standing Movement in Football: Fan Networks, Tactics, and Mobilizations published by Routledge in 2023. He is specifically interested in the application of relational sociology to the study of social networks, social movements, and activism, within different sport and leisure-based contexts. His work often cross pollinates ideas from sociology, political science, and cultural studies, to understand the impacts of events on the regulatory practices of those involved in the event planning and management of sport crowds and consumption.

Jan Andre Lee Ludvigsen is Senior Lecturer in International Relations and Politics with Sociology at Liverpool John Moores University, UK. His research focuses on the sociology and politics of sport, including security, surveillance, fan networks, and sport mega-events. He has authored four books, edited four special issues, and his work has appeared in journals such as The British Journal of Sociology, Sociology Compass, Sociological Research Online, Journal of Consumer Culture, and International Review for the Sociology of Sport.