The author examines the evolution of the constitutional order of the United Kingdom by examining the evolution of royal prerogative powers starting from the study of the most relevant constitutional conventions that regulate the relations between the Monarch, the Government and the Parliament. He highlights how, more recently, the transformations of the English Constitution have been realized through legislative reforms of the Parliament that have regulated some aspects of the Constitution first regulated by the conventions. In particular, more recently, two reforms have influenced the balance of relations between the executive power and the Parliament. This is the change of the House of Lords and the power of dissolution of the House of Co...