Source: https://tendernation.io/opportunities/01a13d0d-48db-70e7-b046-d012360f5668/p16-tunnel-ventilation-attenuators closed GB open procedure Suitable for SMEs # P16 Tunnel Ventilation Attenuators [Costain Group PLC](https://tendernation.io/buyers/costain-group-plc) Estimated value £5,000,000 to £10,000,000 Published 15 Oct 2025 Deadline Closed 29 Oct 2025 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender Costain have been appointed to deliver contract HRS02, the Tunnel and Lineside Mechanical and Electrical services for HS2 ltd. A high-speed railway project that connects London to Birmingham with plans to extend in the future. Package XX Tunnel Ventilation Attenuators scope for contract HRS02 consists of sound attenuators within the headhouses and ventilation shaft areas of the railway, the route being circa 180 km in length, inclusive of; - Tunnel Ventilation Fan Attenuators - Acoustic Panelling - Testing Costain require a supplier for design and supply only of the tunnel ventilation attenuator package. Costain and HS2 are looking for innovative and smart solutions that provide benefits in the following key areas; - Health and Safety - Programme - Installation and commissioning efficiency - Cost - Quality and Assurance efficiency - Whole life cost - Carbon efficiency All the innovation and design development must be accompanied with a rigorous approach to ensuring that the technical requirements are met. Including testing, where necessary. The scope of the design and supply will include the following; - Support to Costain's design partner through concept and detailed design - Noise analysis, modelling and calculations - Testing of products and arrangements - Provision of samples and mock ups - Commissioning support, as required Full details of the scope and specifications will be provided to the successfully shortlisted suppliers. Suppliers should be aware of the scale of the HS2 project and are to assess their internal capabilities to be able to carry out the intended scope of works prior to completing the expression of interest. Read full description ## CPV classification Ventilation ducting Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/adf331e9-3dd0-4e9b-a687-f5f12f8c1f86) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Costain Group PLC: past awards and live tenders](https://tendernation.io/buyers/costain-group-plc) [Sector More Furniture, furnishings & cleaning products tenders](https://tendernation.io/sectors/furniture-furnishings) ## More tenders like this [Teaching equipment – Inköp samt service och underhåll av träslöjdsmaskiner · Örnsköldsviks kommun · 31 days left · 18 Nov 2026](https://tendernation.io/opportunities/01a15183-163d-7283-aee8-b8347a9ba7ae/sweden-teaching-equipment-inkop-samt-service-och-underhall-av-traslojdsmaski) [Furniture – Acquisition d’équipements mobiliers et matériels destinés au Lycée des Métiers de la Mer à La Réunion (974) · Région Réunion · 11 days left · 30 Oct 2026](https://tendernation.io/opportunities/01a15183-1358-72da-a60c-19d077e522b3/france-furniture-acquisition-dequipements-mobiliers-et-materiels-destines-a) [Library furniture – namještaj I oprema ZA knjižnice osnovnih škola · Grad Zagreb · 29 days left · 17 Nov 2026](https://tendernation.io/opportunities/01a15183-0a9a-739d-b9d2-08b5910ccdbc/croatia-library-furniture-namjestaj-i-oprema-za-knjiznice-osnovnih-skola) [Furnishing – Jõhvi Kutsehariduskeskuse (Kutse tn 13, Jõhvi) sisustamine · Riigi Kinnisvara Aktsiaselts · 31 days left · 19 Nov 2026](https://tendernation.io/opportunities/01a15183-144b-72cc-a6d4-5954d41791b9/estonia-furnishing-johvi-kutsehariduskeskuse-kutse-tn-13-johvi-sisustamin) [Theatre seats – Renouvellement de la tribune téléscopique du centre culture de l'Orangerie · Mairie de Roissy-en-France · 32 days left · 20 Nov 2026](https://tendernation.io/opportunities/01a15183-07c7-7113-8193-81d8622e137a/france-theatre-seats-renouvellement-de-la-tribune-telescopique-du-centre-cul) [Floor polishes – produits d'entretien et de voirie · Ville d'Argelès-sur-Mer · 32 days left · 19 Nov 2026](https://tendernation.io/opportunities/01a15183-1705-73b1-9598-e3a6739df07b/france-floor-polishes-produits-dentretien-et-de-voirie)