Using scenario-based influence mapping to examine farmers’ biosecurity behaviour

•Examines how farmers’ responses to animal disease policy are shaped by their relationships with different actors.•Uses stakeholder mapping methods across a range of different scenarios to address bovine Tuberculosis (bTB) in England.•Scenario-based influence mapping provides a systematic method to identify influences on farmers’ biosecurity behaviours.•Farmer influence was not universal and government institutions influence increased in uncertain situations.•Farmers draw upon three logics (‘localism’, ‘paternalism’, ‘business as usual’) when talking about biosecurity influencers.