Our delivery partners

Last updated: 03 July 2017

Our delivery partners

Thames Water

Thames Water's 15 million wastewater customers will pay for the Thames Tideway Tunnel through their bills. Once completed, Thames Water will operate the tunnel as an integral part of the London sewerage network, while Tideway will be responsible for its day-to-day maintenance.

Thames Water is the UK's largest water and wastewater services company. Every day, they supply around 2,600 million litres of tap water to nine million customers across London and the Thames Valley. They also remove and treat more than four billion litres of sewage for 15 million customers.

Thames Water's wastewater customers will pay for the Thames Tideway Tunnel through their bills, with the process for setting customer bills determined by Ofwat.

Current average annual household bills already include £13 for the tunnel and this will eventually rise to no more than £25 a year, before inflation. This is sharply down from the original maximum estimate of £70 to £80. Cheaper finance and other efficiencies mean the tunnel can be built while keeping wastewater bills at or around their current price, before inflation, until at least 2020.

£1.1 billion of the Thames Tideway Tunnel's construction cost will be financed by Thames Water and £3.1 billion by Tideway. Thames Water's contribution will fund development costs, enabling works and interface works. Thames Water was also responsible for securing planning consent (referred to as a Development Consent Order) and acquiring the land needed to construct the project.

West section

Joint venture of BAM Nuttall, Morgan Sindall and Balfour Beatty Group

Central section

Joint venture of Ferrovial Agroman UK and Laing O’Rourke Construction

East section

Joint venture of Costain, Vinci Construction Grands Projets and Bachy Soletanche


As System Integrator, Amey are responsible for providing process control and communication equipment and software systems for operation, maintenance and reporting across the Thames Tideway Tunnel system. Their work started in 2016 and involves up to 70 worksites across London.

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