Thames Water, the largest water and wastewater services company in the United Kingdom, is currently grappling with a series of formidable challenges. The company, which serves a quarter of the UK’s population, is on the precipice of insolvency, a situation that has triggered urgent discussions about securing additional funding and potential structural changes.
On 12th January 2024, the company announced that prices would increase for the average London household from £37 per month to approximately £51 per month (representing a 40% increase):
Figure A

Source: William John Analytics, Thames Water
The company’s financial instability is a key factor driving the proposed price increases. Despite having cash reserves to last 15 months, the company is in talks to secure extra funding to stave off insolvency. The government has stated it is ready to act in a worst-case scenario if the company collapses. This precarious financial situation has raised concerns about the company’s ability to continue providing essential water and wastewater services to its millions of customers.
Additionally, the proposed price hikes have been cited as fuel for an ambitious investment programme aimed at addressing the company’s ageing infrastructure, which has been blamed for a five-fold increase in sewage spills last year. The company believes that customer bills need to rise by 40% by 2030 to fund necessary improvements. However, this proposed increase has sparked widespread concern among its customers, many of whom are already struggling with the cost of living.
Moreover, Thames Water is currently undergoing significant structural changes to address its financial instability and improve its services. The company’s complex ownership structure has been a point of concern, particularly after a holding company, Kemble, defaulted on a debt repayment. This has led to discussions about bringing in a new shareholder to inject further cash, diluting existing investors but staving off the threat of default. Current backers include the UK university staff pension scheme, China’s sovereign wealth fund, and a subsidiary of the Abu Dhabi sovereign wealth fund.
The company has also launched a new regional operating model to get closer to customer needs and priorities. This is part of Thames Water’s efforts to reform itself and justify the proposed bill hike. However, these structural changes are still under discussion and will depend on various factors, including the outcomes of talks with the regulator, Ofwat, and the environment department.
Thames Water is investing heavily in updating its network to improve water supply and wastewater services. The company has committed to a record level of investment, with £808 million invested in the first six months to fund improvements and upgrades at sites including Beckton, Coppermills, Kintbury, and Speen.
In addition, Thames Water is set to invest £400 million upgrading water infrastructure across London to keep the taps flowing for its customers. This includes replacing pipes laid when Queen Victoria was on the throne and operating in and under built-up urban areas. Furthermore, the company has been working round the clock fixing leaks and upgrading the rest of its Victorian-era pipework for the 21st century. Since 2020, Thames Water has reduced water lost to leakage by around 10% and aims to double this goal to 20% by 2025.
In conclusion, Thames Water is at a critical juncture. The company’s financial instability, coupled with the need for substantial infrastructure upgrades, has led to the proposal of significant price increases. These increases, while necessary for the company’s survival and improvement of services, have been met with widespread concern from customers. The company’s structural changes, including the potential for new shareholders and a new regional operating model, are part of its efforts to navigate these challenges. However, these changes are still under discussion and their outcomes remain uncertain. Thames Water’s investment in network updates signifies its commitment to improving water supply and wastewater services. Yet, these necessary improvements come at a cost, contributing to the financial pressures the company is facing.
The crisis at Thames Water extends beyond the corporate realm, impacting its vast customer base and the wider public. It underscores the pressing issues of sustainability, fair pricing, and accountability in the water supply services sector. As Thames Water charts its course through these turbulent waters, its decisions will undoubtedly shape the future of the water industry in the UK. The path it takes will be watched closely, not just by its customers and shareholders, but by all those invested in the future of water services in the UK.
Any opinions expressed in this document are those of William John and are provided for information only. E&OE