Thames Water accidentally debited more than 145,000 pounds from a north London customer's bank account in what it called a human error arising from an incorrect meter reading.
Customer Adam Bainbridge was flung into overdraft and left with a blocked card after the 145,562 pound transaction went through on October 1. The sum, equivalent to decades of water bills, was taken without warning and left him unable to access his own money, a nightmare scenario for any household.
The UK's biggest water company, which owes around 20 billion pounds to lenders, apologised unreservedly and returned the money. But the apology has done little to dent the sense that the episode captures everything the public dislikes about the utility: vast debts, poor service and a casual attitude to customers' money.
Thames Water serves 16 million customers across London and the Thames Valley, and its finances have been under intense scrutiny. The company has been fined heavily for polluting rivers with sewage, and its debt mountain has raised persistent questions about whether it can survive without restructuring or public intervention. MPs have urged ministers to consider temporary public ownership.
For Bainbridge, the ordeal was a sharp lesson in how exposed consumers are to billing errors. A single incorrect meter reading was enough to empty his account and block his card, and only the company's admission of fault ensured the money came back. Consumer groups say the case shows how little protection households have when a utility gets it badly wrong.
The blunder will add fuel to the wider debate about the future of the company. With the regulator Ofwat under pressure and the government weighing its options, every fresh embarrassment makes the case for radical action harder to ignore, and the calls for the company to be taken into public hands are only growing louder.
The incident is the latest in a long line of embarrassments for Thames Water. The company has been fined repeatedly for sewage discharges, criticised for its leaks record and questioned over the pay of its executives, all while its debts have ballooned. Customer trust is at rock bottom, and stories like Bainbridge's confirm the public's worst suspicions about how the company operates. Consumer advocates say the case highlights the need for stronger automatic compensation when companies make serious billing errors, rather than relying on customers to fight for their money back. For Bainbridge, the money has been returned, but the experience has left him wary, and he says he will be checking his statements far more carefully from now on.