Bovine tuberculosis is an intractable policy problem characterised by conflict. Devolution offers the possibility of significant policy variation within Great Britain and bovine tuberculosis has seen this. In Great Britain three distinct policies developed on the back of the same substantial evidence base. Science has not provided the answer and the law has ensured that it remains a difficult issue for the Welsh and Westminster governments. The low incidence of bovine tuberculosis in Scotland has allowed a sustainable policy to develop in that nation.