What was the political regime in Great Britain in the 1920s?

Great Britain maintained its mark, remaining a constitutional monarchy in the interwar period. Parliament still remained bicameral and bipartisan, and therefore the struggle in political circles was only between two main forces. In addition, at this time in Great Britain the influence of extra-parliamentary associations, which actively began to be created after the First World War, expanded. It should be noted that a significant breakthrough for the political system was the opening of the right to vote for all men over 21 and, interestingly for that time, for women over 30, but with a certain property qualification.