25th August 2026
When Britain's water industry was privatised in 1989, the argument was that private ownership would bring investment, commercial discipline and efficiency. The public would benefit because private companies would have the incentive to run the industry effectively, while regulation would prevent them from exploiting their monopoly position.
More than three decades later, it is difficult to look at the problems surrounding Thames Water without asking whether that experiment has produced the result that was promised.
England's water companies are unusual businesses. They operate regional monopolies. If you live in an area supplied by Thames Water, you cannot decide that you would rather buy your water from another company. There is no competitive market in the normal sense. Ofwat therefore regulates prices and investment because customers cannot simply take their business elsewhere.
That creates an important question about the purpose of private ownership.
If a normal private company fails because customers dislike its product, they can go elsewhere and the company can disappear. With water, that cannot happen. The pipes still have to operate, sewage still has to be treated and households still have to receive water.
The customer cannot walk away.
And that means that when a water company gets into financial difficulty, somebody ultimately has to keep the service running.
That somebody is potentially the taxpayer.
The extraordinary financial history
The criticism of privatisation isn't simply that companies have made profits. Making profits isn't inherently wrong.
The much more serious question is whether too much money has been extracted from companies that were simultaneously accumulating debt and failing to invest sufficiently in infrastructure.
The House of Commons Library notes that water companies paid around £2.5 billion in dividends over the two years to 2024, while ten of the 17 companies assessed by Ofwat for financial resilience were below its standard rating, including Thames Water, South East Water and Southern Water in the most serious "action required" category.
This is why the debate has become so bitter.
Customers understandably ask why they should now face higher bills to finance investment that, critics argue, should have been undertaken earlier.
And there is a broader question about the relationship between dividends, executive pay, debt and investment.
If a company is financially healthy, making profits and investing heavily in its infrastructure, there is a reasonable argument for rewarding investors.
But if the infrastructure is deteriorating, debt is mounting and customers face higher bills, the justification for extracting money from the business becomes much harder to defend.
That is particularly true for a monopoly utility.
Thames Water is now the test case
Thames Water supplies more than 16 million customers, making it Britain's largest water company. It has also become the most obvious example of what can go wrong when private ownership, heavy borrowing, inadequate infrastructure and weak financial resilience come together.
Its latest accounts show net debt of £18.5 billion.
The Government therefore faces an uncomfortable choice.
It can allow private investors and creditors to restructure the company and hope that new capital and new management can turn it around.
Or it can intervene more directly.
Special administration is one mechanism available to government. It is designed to ensure that an essential water service continues operating if a company becomes insolvent or otherwise reaches the point where normal corporate arrangements cannot continue.
But special administration is not the same thing as straightforward nationalisation.
And that distinction matters enormously.
Could the Government simply take Thames Water and pay nothing?
This is where the answer is probably not, at least not in the simple sense.
Property and ownership rights are protected by law, and the Government cannot simply announce that shareholders no longer own their shares and walk away.
There would almost certainly be legal challenges.
The Government itself has previously estimated that nationalising the whole English and Welsh water industry could involve compensation of more than £90 billion, using Ofwat's 2024 regulatory capital value estimates.
That is the figure politicians use when arguing that outright nationalisation would be prohibitively expensive.
But there is a crucial complication.
Regulatory capital value is not the same thing as market value.
And this is where Thames Water becomes particularly interesting.
A company carrying enormous debts and requiring enormous future investment isn't necessarily worth what its owners once believed it was worth.
If the company is genuinely insolvent, the value of the shareholders' equity can theoretically fall to zero.
Creditors are normally ahead of shareholders in the queue.
So the question is not necessarily:
"How much would the Government have to pay the shareholders?"
It could instead become:
"What is the value of the shareholders' equity after taking account of the company's debts, liabilities and future investment requirements?"
That is a very different calculation.
Bankruptcy changes the argument
Imagine a hypothetical company with assets worth £10 billion and debts of £15 billion.
It doesn't have £10 billion of value for its shareholders.
It has negative £5 billion of equity.
The shareholders don't own £10 billion.
The creditors effectively own the economic claim on the assets because they are owed more than those assets are worth.
Thames Water isn't necessarily in exactly that position, and its regulatory capital value is considerably higher than its net debt. But the principle illustrates why the cost of nationalising a financially distressed utility cannot simply be calculated by adding up what the owners once invested or what the regulatory asset base says the business is worth.
The Government would have to consider the actual financial position, the legal rights of shareholders and creditors, the company's future liabilities and the investment required to make the system work properly.
That is why this is such a complicated issue.
There is another uncomfortable question: who created the debt?
This is perhaps where the political argument becomes most interesting.
If taxpayers take over a company with £18 billion or £20 billion of debt, they cannot simply pretend that the debt doesn't exist.
Someone has to deal with it.
But neither should the Government automatically assume that every pound of debt accumulated under private ownership must be protected at full value by taxpayers.
Creditors lent money to a private company.
They presumably expected to receive interest and eventually get their money back.
They took a financial risk.
If governments guarantee every private creditor against failure, the distinction between private ownership and public ownership becomes rather blurred.
The private sector gets the opportunity to make money when things go well, while the taxpayer effectively becomes the insurer when things go badly.
That is precisely the criticism that has been levelled at the existing model.
This is the "privatise the profits, socialise the losses" argument
It is a powerful political phrase, but it should not automatically be accepted as a description of every private utility.
Nevertheless, Thames Water provides circumstances in which the question deserves to be asked.
If investors receive dividends and executives receive substantial remuneration during successful years, while taxpayers are subsequently asked to provide billions when the company becomes financially unstable, the public is entitled to ask whether the risks and rewards are properly balanced.
And there has been controversy over executive remuneration even as Thames Water struggles financially. Reports this year have highlighted an increase in payments to key management personnel to £4.1 million.
That does not by itself prove that management pay caused Thames Water's financial problems.
It does, however, make the optics extremely difficult.
A household facing a substantial water-bill increase could reasonably ask why its bill needs to rise while senior executives continue to receive substantial remuneration.
There is also the investment argument
The Government has consistently argued that nationalisation would not necessarily solve the underlying problem.
That is a fair point.
Changing the ownership structure doesn't magically repair leaking pipes or sewage systems.
The water industry needs enormous investment. Ofwat's current price review envisages around £88 billion of industry investment between 2025 and 2030.
Someone has to provide that capital.
If the industry were nationalised, the Government would ultimately have to raise the money through taxation, borrowing or customer bills.
So nationalisation isn't a magic solution in which the infrastructure is repaired for free.
It changes who owns the problem and who ultimately bears the financial risk.
That is the more honest way of looking at it.
But there is an argument for nationalisation that goes beyond ideology
Water is different from most businesses.
You cannot live without it.
You cannot choose between competing suppliers.
There is no meaningful consumer market in which competition disciplines the company.
And the infrastructure — reservoirs, treatment works, pipes and sewage systems — has a lifespan measured in decades.
That makes water much closer to a natural public monopoly than an ordinary commercial enterprise.
Scotland provides an interesting comparison because water remains publicly owned through Scottish Water. England and Wales took the alternative route of privatisation in 1989.
That doesn't automatically prove that public ownership is superior.
Scottish Water has its own challenges and is not immune from criticism.
But it does demonstrate that a publicly owned water system is entirely possible within the UK.
So perhaps the real question is not "Can we nationalise water?"
We clearly can.
The question is:
"How do we do it without making taxpayers pay twice?"
That is the challenge.
If the Government bought all the water companies at valuations that effectively compensated existing investors for the value they might have received under the private system, taxpayers could face a huge bill.
But if individual companies become financially distressed, there may be opportunities to take control under insolvency or special-administration arrangements in which shareholder compensation is considerably lower, depending on the legal and financial circumstances.
That is why Thames Water is potentially such an important test case.
The Government doesn't necessarily have to buy the whole industry tomorrow.
It could potentially allow a failing company to enter a formal insolvency or special-administration process, protect customers, assess the actual value of the business and then determine whether public ownership provides better long-term value.
But even that isn't simple.
The Government has to comply with the law, protect essential services, deal with creditors and provide the investment required to keep the water flowing.
And that is why today's decision to step back from immediate special administration is significant. The Government appears to have concluded that the financial and legal complications are greater than it initially wanted to take on.
Perhaps there is another model
The latest proposals from Thames Water's creditors are themselves an indication that the future may not be a simple choice between the existing private model and complete nationalisation.
The creditor group is proposing a new board and a long-term transformation plan, while offering the Government a possible golden share giving it greater control over important decisions.
There have also been proposals for mutual or not-for-profit structures, in which the infrastructure could effectively be controlled for the benefit of customers rather than conventional shareholders.
These ideas deserve examination.
A water company could potentially be run as a commercially disciplined organisation while having no conventional shareholders demanding dividends.
Any surplus could instead be reinvested in infrastructure or used to reduce bills.
That would represent a very different model from the one created in 1989.
The bigger lesson from privatisation
I think there is a much broader issue here.
The original argument for privatisation was that private capital would solve the investment problem.
But if the system eventually reaches the point where the Government has to consider putting billions into rescuing a private monopoly, it is reasonable to ask whether the original division of risk was designed properly.
Perhaps the biggest mistake was not privatisation itself but the assumption that regulation could perfectly reconcile three competing objectives: keeping bills affordable, providing attractive returns to investors and ensuring sufficient long-term infrastructure investment.
Those objectives inevitably conflict.
If bills are kept low, investment becomes harder.
If investment increases, bills rise.
If investors receive attractive returns, there is less money available for investment.
If companies borrow heavily, they can fund investment without immediately raising bills — but debt eventually has to be serviced.
There is no magic financial formula that makes all four problems disappear.
What should happen to Thames Water?
I think there is a reasonable case for saying that Thames Water should not automatically be rescued simply to preserve the existing private ownership structure.
If private investors are prepared to put sufficient new equity into the company, accept substantial losses on existing investments and provide credible guarantees that the infrastructure will be repaired, then a private solution may still be possible.
But if the alternative effectively requires customers and taxpayers to shoulder the consequences while investors and creditors are protected, the argument for public ownership becomes considerably stronger.
And if the company is ultimately worth less than its liabilities, it is reasonable to ask why shareholders should automatically receive compensation simply because the Government takes control.
That is not the same as saying "nationalise it for nothing".
It is saying that compensation should reflect the actual economic value of the ownership interest after all the liabilities have been taken into account, rather than assuming that shareholders are entitled to be made whole regardless of the company's condition.
That distinction could become extremely important.
England may be approaching a moment of truth
The Thames Water crisis has brought the consequences of the privatisation model into unusually sharp focus.
The company has enormous debt.
It requires substantial investment.
Its customers cannot change supplier.
Its infrastructure is essential.
And the Government cannot simply allow the taps to run dry if the company fails.
That means the state ultimately carries a responsibility whether it owns the company or not.
Perhaps that is the fundamental lesson.
The water industry was privatised, but the responsibility for ensuring that the water system survives could never really be privatised.
The taxpayer remains the backstop.
The customer remains captive.
The infrastructure remains essential.
The question is therefore whether the private ownership structure still provides sufficient benefits to justify the risks and costs that now fall on the public.
And that is a much more serious question than simply whether someone happens to prefer public or private ownership.
It is a question of who should receive the financial rewards from an essential natural monopoly, who should carry the risks when things go wrong, and who should ultimately pay for the investment needed to keep the system working for the next generation.
With Thames Water now carrying around £18.5 billion of net debt and the Government hesitating over the cost of intervention, that question is no longer theoretical.
The great water privatisation experiment may therefore be approaching its real test: not whether private companies can operate Britain's water system, but whether they can do so without eventually requiring the public to rescue the system they were supposed to finance.
Perhaps thankfully Scottish Water has remained in public ownership eveni they do have their own problms to deal with.