Thames Water has opened its consultation on plans for SESRO (South East Strategic Reservoir Option) – a major new strategic reservoir in Oxfordshire. The proposals have been developed in conjunction with Southern Water and Affinity Water, as the reservoir is designed to secure future water supplies for all three company’s customers, a projected 15 million people.

The consultation is open until 28 August and will be supported by a series of community events in Oxfordshire, as well as online resources.

Thames intends to submit a Development Consent Order (DCO) seeking permission to construct and maintain the new reservoir in 2026.