The separation of powers between the United States and Great Britain differ greatly. The United States, as stated in the constitution, has a separation of powers. Article I, II, and III specifically disperse accountability in separation of powers with legislative, executive, and judicial branches. The three branches each hold some control over the other branches creating a checks and balance system. The legislature of the United States is a bicameral legislature. It's bicameral because of the division within the branch creating a republican party and a democratic party. Great Britain's constitution does not call for a separation of powers within its government, but it establishes a parliamentary system. One institution, the parliament, creates all law and policy from border to border, and represents every person between their borders. Great Britain's legislature is also much different than that of the U.S. Their legislature is based on unicameralism, meaning one party represents the law and policy making, being the prime minister and the rest of the elected parliament's majority. One final difference in separation of powers between the two countries is relationship of the lawmaking body and the executive body. In Great Britain the prime minister must be a member of the parliament; contradictory to the United States were the President can't be part of the congress.
Federalism: .
The division of power between the central government and regional units of the United States and Great Britain are very different. After the abolishment of the Articles of Confederation and the new United States Constitution was created our government went from a confederation to federalism. Our country went from a loose association of independent states that governed themselves to a federation where substantial power rests on the national government to govern the country. Great Britain's has a majoratarian based constitution which creates a unitary state of government.
