Kammala wannan jumla: A shekara ta 1971, a hannun dama na Jam'iyyar Labour, Davies na daya daga cikin 'yan majalisa 69 na Labour wadanda suka kalubalanci Whip na Labour don kada kuri'a don shiga cikin EEC. Ya yi yakin neman zaben 'A'a' a majalisar
1979 kuri'ar raba gardama a Wales game da kafa Majalisar Welsh, tare da sauran membobin 'Gang of Six', Neil Kinnock, Leo Abse, Donald Anderson, Alfred Evans da Ioan Evans. Duk lokacin da yake zama dan majalisa, kungiyar APEX ta tallafa masa.