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15 July 2025

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Consultants chosen for Thames Tideway support services framework

14 Jul 16 Three companies have been selected to provide commercial support services for the £4.2bn Thames Tideway Tunnel, London's so-called ‘super-sewer’.

Under the framework agreement, Arcadis, Turner & Townsend and Gardiner & Theobold (G&T) will provide a variety of consultancy services on the project over the next four years.

They were selected following a competitive tender process

Mark Sneesby, chief operating officer and project client organisation Tideway, said: “We’re delighted to have Arcadis, Turner & Townsend and G&T on board. As we start main construction work on the Thames Tideway Tunnel, we are confident that having the knowledge and expertise of three of the most prominent consultancies will be a huge asset in our work to clean up London’s river.â€

Arcadis partner Martyn Court said: “We have been working with Thames Water for the last four years, throughout the procurement phase and supporting the transfer of the project to its new owner last year. With a team of more than 30 people involved in the project – from business advisory and risk and cost specialists, through to water conveyancing and tunnelling experts – it’s a real testament to the strength of our combined expertise to be assured of our continued involvement.â€

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Turner & Townsend director of infrastructure Peter Depledge said: “We’re delighted to be playing a role in ensuring the timely delivery of such a huge and important project which will deliver a positive outcome for Londoners for generations ahead.â€

G&T partner Rob Knight said: “Having had an involvement in the Thames Tideway Tunnel programme since 2013, Gardiner & Theobald is delighted to have been appointed as a key supplier to the commercial support services framework.  We are looking forward to working with the Tideway team and providing our skills and experience on this major London project.â€

Construction of the 25km sewer tunnel under London is set to start this year and be completed in 2023.

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