In science studies the science-policy nexus has been extensively studied by looking at boundary organisations (viz. Jasanoff 1990; Guston 1999; Bijker et al. 2009; Huitema and Turnhout 2009) , at the role of experts in policy development (Rutgers and Mentzel 1999; Nowotny 2000; Hoppe 2005 Hoppe , 2009 Turnhout et al. 2008 ) and at policy cultures, or their absence (Hellström 2000; Halffman and Hoppe 2005; Halffman 2005) . In this context, a biographical approach has two major advantages. First of all, a biographical approach allows us to study the individual views of the experts themselves and the assessments of their own roles. Secondly, a biographical approach allows us to flesh out the relationship between experts, policymaking and public communication.