Thames Water Promises Review After Massive Supply Failure

Power outage left thousands of homes and two hospitals without water

Picture: Thames Water


Thames Water Refuses to Abandon Treated Wastewater Plan

Environment Agency Says Thames Water Plan has 'Substantial Risk'

Backlash Against Plan to Pump Treated Wastewater into River

Council Calls on Thames Water to Stop Dumping Sewage in River

Sign Up For's E-Newsletter,, and,


September 15, 2023

The boss of Thames Water has promised to conduct a review into the company’s procedures, after a power outage left thousands of homes in west and south-west London with no or low pressure water.

Schools were forced to shut due to the incident on Wednesday morning, with the water firm saying the issue had started at its Ashford and Hampton treatment works.

The company’s interim joint chief executive, Cathryn Ross, told an afternoon meeting of the London Assembly’s environment committee that it will investigate the problem’s cause and the effectiveness of Thames Water’s response.

The committee’s Labour chair, Leonie Cooper, asked Ms Ross “how on earth” the incident had happened, adding that it was “not a great look” for the company.

After apologising for the disruption, Ms Ross said: “We will do a review. We will look at what the root cause was, we’ll look at whether there was anything we could have done better, and we’ll obviously learn lessons.”

She said that as far as the company was aware at this stage, the issue was caused by a power outage, rather than a fault of Thames Water’s own equipment.

“Within an hour of the original outage, we had begun to restore flow,” she said.

The company has put three bottled water stations in place at key locations in the affected area, she said, adding that they will remain in place for as long as they are needed.

Two hospitals – the Royal Hospital for Neuro-disability in Putney and the West Middlesex University Hospital in Isleworth – were affected. Ms Ross said that Thames Water offered to provide them both with a tanker supply, but both were back on normal supply before that was necessary.

The Shooting Star Children’s Hospice in Hampton was also affected and offered support, but already had its own water on supply, Ms Ross said.

The following postcodes were hit by the problems: SW4, SW8, SW9, SW13, SW14, SW15, SW18, SW19, TW1, TW2, TW3, TW4, TW5, TW7, TW8, TW9, TW10, TW11, TW12, TW13, TW14, TW17, W1H, W1H, W1M, W1N, W2, W3, W4, W6, W7, W10, W12, W13, W14.


Noah Vickers - Local Democracy Reporter


Like Reading Articles Like This? Help Us Produce More

This site remains committed to providing local community news and public interest journalism.

Articles such as the one above are integral to what we do. We aim to feature as much as possible on local societies, charities based in the area, fundraising efforts by residents, community-based initiatives and even helping people find missing pets.

We’ve always done that and won’t be changing, in fact we’d like to do more.

However, the readership that these stories generates is often below that needed to cover the cost of producing them. Our financial resources are limited and the local media environment is intensely competitive so there is a constraint on what we can do.

We are therefore asking our readers to consider offering financial support to these efforts. Any money given will help support community and public interest news and the expansion of our coverage in this area.

A suggested monthly payment is £8 but we would be grateful for any amount for instance if you think this site offers the equivalent value of a subscription to a daily printed newspaper you may wish to consider £20 per month. If neither of these amounts is suitable for you then contact and we can set up an alternative. All payments are made through a secure web site.

One-off donations are also appreciated. Choose The Amount You Wish To Contribute.

If you do support us in this way we’d be interested to hear what kind of articles you would like to see more of on the site – send your suggestions to the editor.

For businesses we offer the chance to be a corporate sponsor of community content on the site. For £30 plus VAT per month you will be the designated sponsor of at least one article a month with your logo appearing if supplied. If there is a specific community group or initiative you’d like to support we can make sure your sponsorship is featured on related content for a one off payment of £50 plus VAT. All payments are made through a secure web site.