The Development Consent Order (DCO) and the planning process
The timeline
Thames Water will submit its application, likely in early November. Once the timetable for the development consent order (DCO) is published by the Planning Inspectorate, anyone can register their objections to the reservoir with the Inspectorate.
After considering the application, the Inspectorate will hold a hearing in Oxford (likely a few months later). It will tell GARD the period during which people may register as Interested Parties and submit their objections (probably Jan/Feb 2027).
The DCO: who is in charge ?
The Planning Inspectors advise the Secretary of State for the Environment, who makes the final decision. This is currently Emma Reynolds MP.
The Vale of White Horse District Council, usually the planning authority in this area, is not involved, except in opposition to the plans.
Who can register and comment?
Everyone!
First you need to register for updates on the project site. When the application goes live, you need to register as Interested Parties, and you can provide your comments. We will keep you informed about the timing for this.
Adequate consultation
Was the data you were given about the Reservoir plans full, clear and relevant?
Did you have enough time to consider it?
MPs and the local councils think this was not the case and are submitting evidence to the Planning Inspectorate for why they think this is not the case. This evidence needs to be submitted before Thames Water makes its DCO application.
What GARD and other opponents are doing
GARD is investigating multiple issues. We will present this research to the Planning Inspectorate as evidence against the DCO application. Our local MPs and councillors will be objecting to the planning application too.
All opponents are asking for a complete cost re-evaluation of the Reservoir project, after Thames Water tripled the cost estimates at the end of 2025 without explanation. In addition, they are asking for a new and detailed assessment of the best-value project between the proposed Reservoir and the alternative, the Severn Thames Transfer