This working paper explores the governance interactions between infrastructure sectors over three historical time periods with the aim of analysing how these might influence future transitions. The purpose is to develop an understanding of interactions between two sectors (water and electricity). The paper also offers insights into the impact of these interactions on the uptake of sustainable technologies, and draws lessons for the coordination of policies and regulations that cut across traditional sector boundaries. The paper investigates the case of renewable energy use in the water industry in the UK. This has developed links between the water and electricity sectors.