Although in recent Parliaments, Labour and Conservative Speakers have alternated, there is a much longer tradition that a new Speaker is chosen by the majority party. (BNCI)
In Germany, in July 1932, the Nazi party won 230 seats in the Reichstag, which made them the majority party, although Adolph Hitler was not able to become the Chancellor until January 1933. (BNCI)
In practice, however, this is not the case because the party organises the Commons as well as the electorate and the leadership of the majority party forms the government and Cabinet. (BNCI)