Water today, water tomorrow
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Thames tideway

Thames tidewayThe Thames Tideway Tunnel is a large infrastructure project by Thames Water. It is intended to improve the capacity of London’s sewerage system and reduce the number sewage overflows into the River Thames. The largest component is a tunnel underneath the Thames, running from west to east London. It is the biggest scheme delivered by a sewerage company since privatisation.

Our role in the project is to:

  • ensure the cost of the ‘Thames Tideway’ scheme is no more than it has to be and that Thames Water’s customers receive the best value for money possible
  • use lessons learned from this to develop future regulation and financing approaches for largescale infrastructure projects

We will feed into the consultations and decisions by the UK Government, Thames Water and others.

On 4 June 2014, the Thames Tideway Tunnel was specified under the Water Industry (Specified Infrastructure Projects) (English Undertakers) Regulations 2013 following a consultation by Defra in December 2013. The specification requires Thames Water to competitively tender for an Infrastructure Provider to finance and deliver the bulk of the Thames Tideway Tunnel.

Specification notice and reasons to specify.

Find out more about the Thames Tideway Scheme. For more information about Ofwat's role contact us at mailbox@ofwat.gsi.gov.uk.

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