It won't do just to look at things like voting systems, important though these are; we need to deal with the fundamentals about what power lies where. People won't re-engage unless this is sorted out. We need a constitutional convention to find the answers, and fast. What has to be done centrally? How can we re-invigorate or reinvent local government? What should devolution really comprise? What should the balance of central and local taxation be? And beyond that - and on a longer timetable - what about a written constitution [not least to help prevent the Tories from fiddling the system on the scale they are trying now].