Good regulatory outcomes depend on more than well-designed rules and regulations. They also require bodies to administer these rules to ensure that the right policy outcomes are realised. Regulators are at the delivery end of the policy cycle, where they oversee sectors and markets that provide essential services to citizens. The governance of regulators helps ensure that regulatory decisions are made on an objective, impartial and consistent basis, without conflict of interest, bias or improper influence. This series of publications brings together research and recommendations on what makes “world class regulators”, drawing on the experiences of more than 80 regulators from network sectors, including energy, communications, transport and water.