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From Opposition Rises Against Thames Water's Teddington Water Scheme

How could opposition to the TDRA scheme affect Greater London's water security?

Possible What happens if… A possibility worth considering, not a forecast.

Greater London faces increased water supply risk if TDRA scheme is blocked The TDRA scheme proposes transferring up to 75 million litres of treated wastewater daily from Mogden Sewage Treatment Works into the River Thames above Teddington Weir. This water would then be piped to the Lee Valley reservoirs to supplement London's drinking water supply during prolonged dry weather. If the scheme is blocked by local opposition, Greater London loses a planned measure intended to ensure water security, potentially increasing operational risk and costs for the region.

Reported by 1 independent outlet Written Saturday
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How it reaches Greater London

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The facts so far

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  • The scheme aims to replace up to 75 million litres of water a day in Teddington.aol.co.uk
  • The water would be highly-treated wastewater from Mogden Sewage Treatment Works.aol.co.uk
  • The scheme is intended to ensure London has enough drinking water during prolonged dry weather.aol.co.uk
  • Richmond Council leader Gareth Roberts is opposing the plan.aol.co.uk
  • Thames Water plans to apply for a development consent order in early 2027.aol.co.uk

Why it matters

The TDRA scheme represents a major infrastructure effort by Thames Water to mitigate the risks of water scarcity in London. If the scheme is successfully implemented, it provides a crucial buffer against drought, supporting the operational stability of the water supply for Greater London.

However, the strong opposition from local authorities and campaigners means the project is not guaranteed. If the scheme is shelved, Greater London must rely on existing, potentially less resilient, water management strategies to cope with future dry periods, increasing the long-term operational risk for the region.

What we don't know yet

  • What specific alternatives to the TDRA scheme are available to solve London's water supply problem?
  • How much financial or operational cost would Greater London face if the TDRA scheme is permanently blocked?

What would change this answer

The Government grants the development consent order for the TDRA scheme.The effect on Greater London would become more certain and positive, as the planned water security measure would be moving toward implementation.
The opposition successfully forces Thames Water to abandon the TDRA scheme entirely.The operational risk for Greater London would increase significantly, forcing a re-evaluation of regional water resource management.

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  • About Water Harvesting

    How does the TDRA scheme compare to other potential water harvesting or reuse strategies being considered for Greater London?

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Brind's analysis is written by AI from the reporting linked above and can be wrong. This explainer is a possibility worth considering, not a forecast: steps marked as Brind's reasoning are not stated in the reporting. It is not investment advice; do your own research.