Allen, P., 2020. Political Ambition in Britain Survey, 2017. UK Data Service. Available from: https://doi.org/10.5255/UKDA-SN-8599-1.
Fisher, J., Cutts, D., Fieldhouse, E., 2016. Survey of election agents for study of constituency campaigning at the 2015 British general election. UK Data Service. Available from: https://doi.org/10.5255/UKDA-SN-852527.