Major River Thames flood alleviation project passes key milestone

Thousands of homes across Surrey and the surrounding area are set to be better protected from flooding, after the Government approved the latest stage of the River Thames Scheme. 

The Environment Agency and Surrey County Council are leading the partnership which will deliver the River Thames Scheme. The scheme will reduce the flood risk for 11,000 homes and 1,600 businesses in communities along the river.  

Today’s announcement means that Defra and HM Treasury have approved the outline business case (OBC) for the scheme. The OBC lays out why the scheme is needed, how it will be built and its value for money. This approval unlocks the first £60m of the scheme’s funding so that detailed design and planning work can begin.   

Floods Minister Rebecca Pow said: “As a vital part of the government’s record investment in flood risk management schemes across the country, the River Thames Scheme will provide better protection for thousands of properties, including many which suffered the devastation of flooding in 2014. 

“In addition to providing £285m in funding, by treating the scheme as a Nationally Significant Infrastructure Project we aim to streamline the planning and authorisation process and ensure that communities along the river can get the protection they need as quickly as possible.” 

The £501m River Thames Scheme will see two new flood relief channels constructed at Runnymede and Spelthorne, together with capacity increases at Sunbury, Molesey and Teddington weirs and the Desborough Cut. The scheme’s wider benefits will include new walking and cycle paths, parks and wildlife habitats.  

Environment Agency Chair Emma Howard Boyd said: “The River Thames Scheme will help to protect people and give businesses greater confidence in the resilience of the local economy in response to climate change.

“The scheme will also enable community access to green space, enhance nature and, by creating new walking and cycle paths, it will increase connectivity and promote active travel. It’s a fantastic example of organisations working in partnership to help communities adapt and thrive.”

Surrey County Council is supporting the scheme through the £270m Surrey Flood Alleviation Programme. Other local authorities are also delivery and financial partners. (See notes to editors.)  

Tim Oliver, Leader of Surrey County Council, said: “This is great news for Surrey and its neighbours. The scheme means communities along the River Thames can look forward to a brighter future knowing that Surrey County Council, the Environment Agency, their partners and the project’s team of expert engineers are working hard to reduce the likelihood of their homes and businesses flooding.”  

Detailed planning and design work is starting. The large scale of the project means the government has directed that it be treated as a Nationally Significant Infrastructure Project (NSIP). NSIPs require a type of consent known as ‘development consent order’ (DCO). A DCO removes the need to obtain several separate consents, including planning permission and is designed to be a quicker process than applying for these separately. The DCO must be granted before full funding is approved and construction can begin.     

Supporting quotes from local MPs

Esher and Walton MP Dominic Raab said: “This decision is good news for Elmbridge, and particularly for communities close to the River Thames like Walton, Molesey and Thames Ditton.

“Many residents will remember the serious flooding in 2014. This scheme will help to protect thousands of local homes and businesses from that level of disruption in the future.”

Dr Ben Spencer, MP for Runnymede and Weybridge, which was seriously affected by the 2014 flooding, said: “This is fantastic news! The River Thames Scheme is going ahead and residents will be delighted that the Government has agreed the outline business case and the detailed planning and public consultations can now begin.

“This is a huge milestone for the project, but we must keep the momentum going and ensure all efforts are made to deliver the Scheme and the protection it provides as soon as possible. I will continue to work closely with Defra, the Environment Agency, Surrey County Council, our borough Councils and local residents to drive this forwards.”


Notes to editors 

  • The scheme’s wider partners are Elmbridge Borough Council, London Borough of Richmond upon Thames, Royal Borough of Kingston upon Thames, Runnymede Borough Council, Spelthorne Borough Council, Thames Regional Flood and Coastal Committee, Thames Water, Enterprise M3 Local Enterprise Partnership, Thames Valley Berkshire Local Enterprise Partnership. 
  • The River Thames Scheme will reduce flood risk to people living and working near the Thames, enhance the resilience of nationally important infrastructure, contribute to a vibrant local economy and maximise the social and environmental value of the river. 
  • There have been serious floods in this area over the past 100 years, namely in 1947, 1968, 2003 and most recently between 2013/2014. 
  • We will build two new flood channels alongside the River Thames to reduce flood risk to 11,000 properties in communities in Hythe End, Egham, Staines, Chertsey, Shepperton, Weybridge, Sunbury, Molesey, Thames Ditton, Kingston and Teddington. 
  • There will be increased capacity of the Desborough Cut and weirs at Sunbury, Molesey and Teddington by installing additional weir gates. 
  • A third channel in Berkshire is no longer being taken forward. 


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