Our Statutory Consultation 2025 is now closed
Teddington Direct River Abstraction (TDRA)
Thanks to everyone who shared feedback during our Teddington Direct River Abstraction (TDRA) project statutory consultation (17 June - 26 August 2025). Our proposals included how we would be delivering this project, with key activities – including building tunnels, new structures and shafts – at Mogden Sewage Treatment Works, Ham Playing Fields and near Teddington Weir.
The consultation period has now ended and we’re now carefully analysing all the responses we received. Your feedback is important as we update our proposed design and further develop any mitigation measures. We’ll provide further updates on the project ahead of our Development Consent Order (DCO) submission in 2026.
During times of prolonged dry weather, this vital drought resilience project for London would provide up to 75 million extra litres of water per day, supplying residents, businesses, schools, hospitals and other essential services. Throughout the TDRA statutory consultation, we sought your feedback on:
- Project design, operation and maintenance
- Indicative construction activities and schedule
- Potential effects on communities and the environment
- Managing potential environmental effects
- Land needed for the project and how it would be used
- Draft overarching Design Principles
- Opportunities to enhance local spaces
During droughts, we’d take water from the River Thames using a new intake located upstream of Teddington Weir. We’d then transfer the river water via a new underground tunnel to our existing Thames Lee Tunnel (TLT), which connects to our Lee Valley reservoirs. From here, we would treat it further to become drinking water for customers across Greater London.
To keep river levels balanced, we’d replace the water we’ve taken at Teddington with the same amount of recycled water from our proposed new Tertiary Treatment Plant (TTP) at our Mogden Sewage Treatment Works. This extra treatment step would improve the quality of the water that would be discharged, helping us maintain river levels and protect the environment.
We produced a range of consultation materials to help you find out more on our proposals, including documents, videos and maps. In our document library, our Statutory Consultation Brochure provided an overview of the project, and we also produced a Consultation Materials Fact Sheet which set out what consultation materials there were.
Printed copies of consultation documents were available at public information events, and at selected venues in your local community, such as libraries and community centres. These deposit locations and information points were also listed in our document library.
Discover more about how our vital drought resilience project for London would work.
Thanks to everyone who took part in our consultation events. If you weren’t able to attend in-person, you can still catch up - our webinars cover project highlights and answer key questions. Click here to watch our webinars in the Document Library.
You can open the full document library and view or download any of the documents published for statutory consultation here. Click here to find out more.
Find out more about how we’d build the project
The Preliminary Environmental Information Report (PEIR) showed our initial assessment of the project’s likely significant environmental effects. The PEIR Non-Technical Summary (NTS) document summarised this information.
We also created a digital version of the PEIR NTS, which guided you through the chapters showing relevant information on various maps.
Using our Interactive Map, you could decide what information the map shows about the project. In addition, each map layer offered topic-specific suggestions as to which consultation materials would help you understand the project better.