Complex sentence: For these reasons, it used to be considered a party of the centre-left economically, and its base consisted largely of the working class; however, the majority of its policies now are in fact centre-right.
Split into simpler sentences: For these reasons, it used to be considered a party of the centre-left, economically, and its base consisted largely of the working class. However, the majority of its policies now are in fact centre-right.