Abstract
The British party system is often regarded as a model of stability and longevity. Indeed, the early development of a parliamentary system in this country makes it very difficult to separate the political, whatever its form, from the parties. In addition, this system is characterized by a bipolar party domination that can be largely explained by the election system: the majority on round. In fact, the two main parties have the majority by alternatively?
That is why the last election, that in May 2010, which has led to a coalition between the Conservative and Liberal Democrats, is an exception. We can think that Great Britain is undergoing a profound change, and that small parties will have an opportunity to be represented institutionally, that is to have MPs. I will try to show that this change is not possible as long as the election system remains unchanged and that the dominant parties' best interest is not to reform the system. This system will not change unless the parties are challenged.
