Is that a genuine question?
Or just another silly response because you want to challenge it but do not have the wit to do so?
Think: both Houses of Parliament, the Judicial system, and the Media.
Interestingly, a BBC article, way back in 1998, recognised the ECHR and devolution as another two of those checks and balances, both of which the government want to over-ride.
By BBC Constitutional Affairs Correspondent Joshua Rozenberg.
In constitutional theory, parliament is supreme and the executive is merely its handmaiden. In practical politics, the government can generally rely on a majority in the House of Commons to vote for its proposals.
What checks and balances does our constitution have to stop the UK becoming, in Lord Hailsham's famous phrase, an 'elective dictatorship'?
The judiciary and the media
First, of course, there are the courts. In recent years, the judges have fashioned judicial review into a powerful check on the executive.
Although the judges have always insisted that they are not concerned with the decisions taken by ministers - merely the way in which those decisions are taken - governments have long suspected the courts of seeking ways of overturning decisions which they do not happen to like.
Secondly, we have the media. Journalists, however influential, can do little to stop a government that believes it has public opinion on its side.
But the tabloid newspapers have been remarkably effective in forcing from office several ministers whose standards of morality and behaviour they did not consider acceptable.
Constitutional evolution
And finally, there are the constitutional changes mentioned in other sections.
It seems there can now be no major changes to the powers of parliament without approval from the people in a referendum.
With the prospect of proportional representation for elections to the House of Commons, governments may no longer be able to rely on majorities of landslide proportions.
Central government will have much less power when we have a Freedom of Information Act, when the European Convention on Human Rights is incorporated into our domestic legal systems, and when there is devolution to Scotland, Wales and perhaps - to a lesser extent - in London and some of the English regions.
These developments will further restrict the power of government, making it harder for critics to claim that the UK has an over-mighty, over-centralised executive at the heart of its constitution.
If not, the constitution will have to be changed once again.
http://news.bbc.co.uk/1/hi/uk_politics/88182.stm