Welsh voters have rejected Labour and Starmerite managerialism. By offering hope and not division we showed the populist right can be beaten Rhun ap Iorwerth is the leader of Plaid Cymru Welsh voters have rejected Labour and Starmerite managerialism. By offering hope and not division we showed the populist right can be beaten Rhun ap Iorwerth is the leader of Plaid Cymru P laid Cymru’s decisive victory in the Caerphilly byelection proves that Labour’s century of dominance in Wales is over.