Abstract This article compares the historical trajectories of democratic innovations across space and time in the UK by analysing the development and impact of collaborative governance, participatory budgeting, referendums, and mini-publics. This is an interesting country for longer-term analysis. First, the UK has been considered an inhospitable environment for democratic innovation. Second, it has experienced asymmetrical decentralisation of legislative and executive powers from national to subnational institutions. Third, these changes have taken place during a period of democratic backsliding. We analyse how these dynamics are interrelated by charting the trajectory of four types of democratic innovations in four different countries of the UK (space) from the 1970s to the present (time). We find that, after years of limited democratic innovation there has been rapid, although geographically asymmetrical, development in recent decades. We argue that the importance of these differences should not be overstated in relation to democratic deepening. We conclude that, to advance democratic innovations in the UK, a constitutional convention is required.
Elstub et al. (Wed,) studied this question.