A real parliamentary democracy
* Create a written constitution that sets out what power each part of the political system has.
* Ensure the constitution can only be changed by referendum or by a 'super-majority' in both houses of parliament (two thirds or three quarters of MPs, for example).
* Give the power to set parliament's timetable to MPs, not the government.
* Scrap royal powers currently used by the government, including scrapping the Privy Council.
* Introduce a fully elected upper house, giving elected representatives the power to challenge and, if necessary, block laws and decisions proposed by government.
* Elect an independent, non-political head of state who can act as referee and defender of the constitution. With the power to refuse to sign a law if they believe it's unconstitutional, and to help the parties negotiate in times of political paralysis this gives all sides of politics a more equal position in the constitution.
Of course the government must still have the power to govern, and parliament must have the power to make laws. But governing and making laws are two different things, and both should be done withing a system that has limits on the power of government and parliament, limits that are protected by an independent, accountable head of state.