One hundred and 12 members of parliament have signed an open letter to the environment secretary and Ofwat, the water services regulation authority, calling for Thames Water to be placed into special administration without delay. Since June 2025, Thames Water creditors, a group of US hedge funds, has been negotiating with Ofwat to formally take over the utility. In total 53 Liberal Democrats signed the list, 46 Labour MPs, six independents, five Green party MPs, one from Plaid Cymru and one from the Conservative party. The letter highlights the dangerous possibilities of the company setting its own rules would create a dangerous precedent for all of England's privatised water companies. Thames Water was responsible for a third of the worst pollution incidents in 2025.