Future of Thames Water

Sarah Olney Excerpts

Tuesday 6th January 2026 Westminster Hall

[Layla Moran]

Thames Water’s repeated mismanagement is why the Liberal Democrats have long called for all of the water company bosses not to receive that level of payout. We will continue to campaign in that vein.

Locally, we have been campaigning on the issue for many years. Along with Safer Waters, Thames21 and local activists, we secured bathing water status for Port Meadow in Oxford, only the second inland site in the country. That has forced Thames Water to monitor and report on water quality there, but for the last three years, that rating has been “poor”. Residents in Oxford, like others across the country, continue to risk their health every time they swim.

One would think that poor quality would logically lead to action, but it seems not to have done. In a debate just two years ago, I called for legally binding targets on sewage pollution, so I was pleased when the Government promised last July to halve sewage pollution by 2030. Today, I urge the Minister and the Government to move faster and to take all legal and financial steps necessary to make that change happen, because, as we have heard, Thames Water customers experience poor service, flooding, sewage in their homes and sewage in their rivers, and for this, they are being asked to pay more—indeed, 31% more in 2025-26 than the year before.

[Sarah Olney (Richmond Park) (LD)]

My hon. Friend is giving an excellent speech on a topic that is very close to every Liberal Democrat heart. Thames Water is in £17 billion of debt, yet the company continues to progress with the Teddington direct river abstraction in my constituency, with a plant that would be operational for just six weeks a year at a cost of £1 billion. The project is strongly opposed locally on environmental, social and economic grounds. Does my hon. Friend agree that Thames Water should scrap the project and use that money to cut bills?

[Layla Moran]

I do not trust Thames Water to do anything, and I will come on to an example of an even bigger and even worse project. We want investment and change, but the problem we have is that there is no longer any trust that this company can do that on time and on budget, and in a way that is actually going to deliver real change. That is why 2,507 local residents across Oxfordshire backed a Lib Dem petition calling for these price hikes to be scrapped. If this were a proper private company, it would not be asking customers to pay more for this level of service, yet that is exactly what it has done, and it has frankly given them no say in the process.

While I am lambasting this company today, I am not having a go at its hard-working staff. We need to be clear that they are not to blame for the current woes and dismal performance. In July, I visited Abingdon sewage treatment works, and friendly and knowledgeable people who had worked there for decades told me how the system is supposed to work: tanks remove the sludge, microbes digest bacteria and clean water is discharged. It was so clean that I could have drunk from it there and then—in fact, a heron strutted around the wetland ponds showing exactly what would have been possible. Sadly, that summer idyll is all too frequently shattered when the rain falls, the floodgates open and raw sewage pours out.

At this point, I should acknowledge the role that we and the public can play in helping to reduce pressure on the system. We have seen with our own eyes those mountains of wet wipes being removed from the pipes, and that skip full of rubbish that should never have been flushed down the toilet in the first place. Do the Government have plans for a public information campaign on this matter—paid for, of course, by water company profits? If we saw as many adverts on this issue as we do on things such as fast food, it would help everyone in protecting our rivers.

However, I do not want to downplay the institutional failings that we see in the company. We need additional capital investment; in Abingdon specifically, the staff were asking for another set of tanks to filter and clean the sewage to help that problem there, but it is the same everywhere. Last year, Thames Water admitted that £19 billion of its assets were deemed “poor” or “failed”, posing a risk to thousands of homes.