Financial Resilience and Regulation in the English and Welsh Water Sector: Lessons for Europe.

The crisis of the English water sector, culminating in the Thames Water case, has brought to the forefront of the international debate the issue of financial resilience in water utilities and the effectiveness of regulatory models. The report of the Independent Water Commission chaired by Sir John Cunliffe highlights deep structural weaknesses: excessive leverage, aggressive financial engineering, institutional fragmentation, inefficiencies in environmental enforcement, and a regulatory framework not always capable of preventing risky financial trajectories. The paper reconstructs the evolution of England and Wales regulation in recent years with regard to financial resilience—from the permissive pre‑2020 model, to the Gearing Outperformance Sharing Mechanism introduced in PR19, up to the new PR24 paradigm based on stringent investment‑grade rating requirements and a reduction in notional gearing—and analyses its effects on the sector’s investment capacity. This experience offers valuable insights for Europe, where the water sector is called upon to meet substantial infrastructure needs, strengthen the financial solidity of operators, and ensure a balanced relationship between regulatory incentives, investment sustainability, and consumer protection. Understanding the England and Wales dynamics makes it possible to anticipate similar risks and assess the effectiveness of economic‑financial regulatory tools. The English case thus becomes a useful laboratory for guiding future choices in the European regulatory system and for reinforcing the resilience of the national water service.