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Corporate Info

Bazalgette Tunnel Limited (BTL), is the licensed Infrastructure Provider set up to finance, build, maintain and operate the Thames Tideway Tunnel. BTL trades and is known to the public as 'Tideway'.

Tideway is owned by a consortium of investors that comprises Allianz, Amber Infrastructure and Dalmore Capital. Our investors have extensive experience of investing in and managing a wide range of infrastructure assets in the UK and overseas. More than two million UK pensioners have an indirect investment in Tideway through UK pension funds managed by our investors. The consortium's backing fulfils a key component of the HM Treasury's National Infrastructure Plan, designed to finance the development of UK infrastructure with the support of highly experienced private investors.

Tideway employs more than 400 highly experienced professionals to deliver the project, together with its four main delivery partners:

The construction in the west region is being delivered by a joint venture of BAM Nuttall Ltd, Morgan Sindall Plc and Balfour Beatty Group Limited. This contract is known as Tideway West, with work taking place from Acton to Fulham.

The construction in the central region is being delivered by a joint venture of Ferrovial Agroman UK Ltd and Laing O'Rourke Construction. This contract is known as Tideway Central, with work taking place from Fulham to Blackfriars.

The construction site in the east region is being delivered by a joint venture of Costain Ltd., Vinci Construction Grands Projets and Bachy Soletanche. This contract is known as Tideway East, with work taking place from Bermondsey to Stratford.

Finally, the System Integration contract has been awarded to infrastructure support service provider, Amey. Amey is responsible for providing process control, communication equipment and software systems for operation, maintenance and reporting across the Thames Tideway Tunnel system.

Preparatory works on the sites across London started in 2015, and main construction started at the three main hub sites in 2016. You can find out more about the construction progress here: Tideway construction sites. Work is anticipated to be completed by 2024.