What's the point of Parliament if every decision can, theoretically at least, be made by consulting the people? Seems like this defeats the very concept of representative democracy.
In that sense I guess I am in agreement with TTT -- referenda ought to be restricted to "direction" questions, ie "where do we want our country to go?" In the case of the recent EU referendum, the answer was "out of the EU", but that leaves the details of how to implement this still within the purview of parliament. In the case of the tax on jelly babies, it's not a directional issue so doesn't deserve a referendum. If there were strong enough feeling on it then you would have to pressure MPs to support the measure in a more traditional way.
It seems that Brexit, whatever else it ends up meaning, has still exposed certain weaknesses in our democracy -- or, at least, potential contradictions. Surely it's as good a time as any to sort these out.