House of Commons. The House of Commons of Great Britain was the lower house of the Parliament of Great Britain between 1707 and 1801.
   In 1707, as a result of the Acts of Union of that year, it replaced the House of Commons of England and the third estate of the Parliament of Scotland, as one of the most significant changes brought about by the Union of the kingdoms of England and Scotland into the Kingdom of Great Britain. In the course of the 18th century, the office of Prime Minister developed.
   The notion that a government remains in power only as long as it retains the support of Parliament also evolved, leading to the first ever motion of no confidence, when Lord North's government failed to end the American Revolution. The modern notion that only the support of the House of Commons is necessary for a government to survive, however, was of later development.
   Similarly, the custom that the Prime Minister is always a Member of the Lower House, rather than the Upper one, did not evolve until the twentieth century. The business of the house was controlled by an elected Speaker.
   The Speaker's official role was to moderate debate, make rulings on procedure, announce the results of votes, and the like. The Speaker decided who may speak and had the powers to discipline members who break the procedures of the house. The Speaker often also represented the body in person, as the voice of the body in ce
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