Ofwat's decision to reject Thames Waters' bid to increase prices by 8% is final, but Thames Water could appeal to the Competition Commission.
The company said: "We will review the decision carefully before deciding on our next steps."
More top news
The top temperature could reach 26 Celsius, which would set a new record for Easter Sunday.
Sri Lanka's state-run newspaper reports 129 people have been killed.
Robert Glenister complains he faces having to sell or remortgage his home after losing tax row.