18 pages, Consumer preferences for food produced using currently prohibited production methods matter, especially in relation to potential trade deals. We conduct four discrete choice experiments examining UK consumer attitudes for food produced using several agricultural production methods currently prohibited in the UK, including chlorine washed chicken. Our results reveal negative preferences for these forms of agricultural production methods whereas EU food safety standards are highly valued. Willingness-to-pay estimates indicate that the positive values for food safety are frequently greater than the negative values placed on prohibited food production methods. Similarly, UK country of origin was highly valued but organic production was less valued. We discuss the implications of these results and, more generally, the use of stated preference estimates in economic modelling underpinning trade negotiations.