Thames Water agrees payment plan for record £122.7m fine

Could Thames fall under government control?

What happened with KKR?

How did Thames end up looking for a rescuer?

What does all this mean for customers?

How can I save money on my water bill?

Who owns Thames Water now?

Why was Thames Water privatised?

The UK's largest water company will pay 20% of the fine, or £25.4m, fine no later than 30 September, after the troubled firm agreed a payment plan with regulator Ofwat.

Ofwat said the remainder of the fine has to be paid

The agreement comes as the government has lined up administrators FTI Consulting in case the firm collapses.

The company has huge debts and is struggling to fix leaks, stop sewage spills and modernise outdated infrastructure. It serves about a quarter of the UK's population and employs 8,000 people.

The government said on 12 August that Thames Water remained "financially stable", but it had "stepped up" preparations in case the firm falls into administration.

FTI Consulting is advising the government on a special administration regime (SAR), a form of contingency planning - this would happen if Thames becomes insolvent, cannot fulfil its duties or breaches an enforcement order.

If the firm does go bust, households will still have drinking water and sewerage services.

Thames said it was focused on making itself financially viable and that "constructive discussions with our many stakeholders continue".

The GMB union said the firm had been "sacrificed on the altar of privatisation".

The likelihood of Thames collapsing into a SAR increased after US private equity giant KKR pulled out of plans to buy the company in June, although the company continues to court investors.

KKR had been selected as the preferred partner to inject £4bn of much-needed cash into Thames.

It is one of the world's largest private equity firms with $160bn (£119bn) of investments globally. The firm is already a shareholder in another UK provider, Northumbrian Water.

KKR's withdrawal came on the same morning that an independent commission released interim findings of a review into how the water industry can be reformed - a review which many saw as potentially supportive in attracting new investment.

Thames called the news "disappointing" but said it would proceed to work with other potential investors who submitted earlier expressions of interest.

Many UK water companies have large debts, but Thames Water's problems are the worst.

When Thames was privatised in 1989, it had no debt. But over the years it borrowed heavily and its total debt - which includes all of its borrowings and liabilities - now stands at £22.8bn, according to latest financial results.

Its debt pile increased sharply when Macquarie, an Australian infrastructure bank, owned Thames Water, with debts reaching more than £10bn

Macquarie said it invested billions of pounds in upgrading Thames's water and sewage infrastructure while it owned the company, but critics argue that it took billions of pounds out of the company in loans and dividends.

In May, Thames was handed the biggest ever fine issued

In July, Thames warned it was "extremely stressed" and posted huge annual losses.

No matter who eventually owns or runs Thames Water, customers will see no impact on their services. Taps will still run and toilets will still flush.

However, Thames has said it needs to increase its bills to fix problems, with the average annual bill rising

Consumer groups argue people shouldn't have to pay more because the company has been badly run.

But Sir Adrian Montague, Thames Water's chairman, warned that without bigger price rises, the company cannot guarantee safe and resilient water supplies that can cope with climate change and population growth.

Thames Water is privately owned

Other investors include funds from Canada, Australia, and the Netherlands.

The entire water and waste sector was privatised under Margaret Thatcher's Conservative government. At the time, Thatcher wrote off the industry's £5bn debt, leaving companies with a clean slate, and gave them £1.5bn in public money.

At the time, the UK was under pressure to meet European water quality standard standards. Thatcher wanted the billions of pounds of investment need to do this to come from the private sector and,

"If we want environmental improvement, it will cost money," said Mrs Thatcher in 1988. "It will be the people who want those improvements in water who will have to pay."

However, critics say that privatisation has not worked as water firms have taken on too much debt while failing to invest in infrastructure.