S&P Ratings Action

Thames Water Utilities Finance plc

S&P Ratings Action

Thames Water Utilities Finance plc ("TWUF" or the "Company") notes the rating downgrades published today by Standard & Poor's ("S&P"). S&P has downgraded its Class A debt rating to BB and its Class B debt rating to B. These ratings have a negative outlook.

Thames Water Utilities Limited ("TWUL") alerted Ofwat to the possibility of potential credit rating downgrades in April 2024 and continues to work with Ofwat to maintain the ongoing financial resilience of the business. Management is engaging with investors and its creditors and remains committed to seeking new equity funding and exploring all options to extend its liquidity runway.

Increasing our financial resilience and securing an investible PR24 determination is a critical priority for the business. In the meantime, it's business as usual for our customers and our teams on the ground who will continue to supply our services and remain focused on the delivery of our turnaround plan.

Ends

Investor enquiries

Sarah Davies - Head of Investor RelationsFrederick Maroudas - Director of Corporate Finance [email protected]

Media enquiries

Suvra Jans - Head of Media Relations [email protected]

07747 640 810