How did Montesquieu somewhat misinterpret the exercise of political power in England?

Montesquieu, in his analysis of political power in England, somewhat misinterpreted the balance and separation of powers by overemphasizing the role of Parliament while downplaying the influence of the monarchy and the political culture that shaped governance. He portrayed the British system as a harmonious balance between the legislative, executive, and judicial branches, neglecting the complexities of political realities, such as the monarchy's significant role and the evolving nature of political parties. Additionally, he underestimated the impact of public opinion and societal norms on the exercise of power, which often influenced political decisions beyond formal structures.