This paper provides an analytic description of four health-related risk regulation regimes in the UK (governing radon in the home, dangerous dogs outside the home, pesticide residues in food and water, and ambient benzene). It compares observed state activity for information-gathering, standard-setting and behaviour modification or enforcement in those four regimes with what would be expected from the standpoint of a 'minimal feasible response' hypothesis. Such a hypothesis assumes state activity will consist of the minimal level of intervention needed to correct specific failures in market or tort-law processes (where the costs of informing oneself about risks or opting out of risks through market or civil law methods are very high). Only ...