The liberals within the Labour Party were primarily members of the pre-war social liberal Free-thinking Democratic League (VDB), who went on to join the Labour Party in the post-war Doorbraak ("Breakthrough") movement.
这些工党内部的自由派主要是由战前社会自由主义思想的自由民主联盟（VDB）组成，他们参加了在战后Doorbraak（突破）运动。