Using figures published by the UK Department of International Development (DFID), this study finds that despite overwhelming evidence in favour of agroecology as a mode of agricultural development able to address crucial aspects of the interrelated crises facing human societies, UK development aid barely supports agroecology. Based on the most generous interpretation, this study shows for the first time that aid for agroecological projects is less than 5% of agricultural aid and less than 0.5% of total UK aid budget since 2010. Since 1 January 2010, no funds at all have been directed at or been committed to projects with the main focus on development or promotion of agroecological practices. Minor funds have been directed at projects which include some activities promoting agroecology at the most basic level of resource efficiency (e.g., conservation agriculture). By largely supporting industrial and Green Revolution agriculture, UK Aid priorities contribute very little to the transition towards social-ecological sustainability in Africa, Asia, and Latin America.