Source: https://tendernation.io/opportunities/01a13d18-bf6b-7257-9581-baab86afe321/high-speed-ocs-design-construction-testing-commissioning-approved-body-engag closed GB open procedure Suitable for SMEs # High Speed OCS Design, Construction, Testing & Commissioning Approved Body Engagement [Colas Rail Limited](https://tendernation.io/buyers/colas-rail-limited) Estimated value £150,000 to £250,000 Published 4 Jun 2026 Deadline Closed 17 Jun 2026 ## 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 Colas Rail are looking to engage with an Approved Body to support with obtaining UK declaration of conformity for its Interoperability Constituents (ICs) relating to specific elements of first principle Overhead Catenary System (OCS) design elements and to provide re-certification of the existing TSI compliant system design to NTSN in support of its OCS Design, Construction, Testing & Commissioning activities on behalf of HS2. Additional information: The services shall be delivered in accordance with Colas Rail CR2 Professional Services Agreement Terms & Conditions, including applicable HS2-specific provisions; copies will be issued to shortlisted suppliers. Suppliers to submit their tender proposal by the tender deadline of Wednesday 17 June 2026 by email to . If you have any questions, please send them to and we shall endeavour to respond to them at the earliest. ## CPV classification Monitoring and control services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/3202f230-5093-461b-92ae-37e54e4a19a8) 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 Colas Rail Limited: past awards and live tenders](https://tendernation.io/buyers/colas-rail-limited) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Asbestos Management Framework · Home Group · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15476-5fff-736e-ae2e-0c8a400c7297/asbestos-management-framework) [Infrastructure works consultancy services – Contrôle extérieur des chaussées · Collectivité européenne d Alsace · 29 days left · 17 Nov 2026](https://tendernation.io/opportunities/01a15183-1730-733b-8247-a32bbbe2211c/france-infrastructure-works-consultancy-services-controle-exterieur-des-chau) [Architectural, construction, engineering and inspection services – Single Party Framework Agreement for Architect Led Integrated Design Team Services for Fire Safety Remediation Works for Dublin City Council · Dublin City Council · 5 days left · 23 Oct 2026](https://tendernation.io/opportunities/01a15183-0a15-7156-849b-5a223dd6d615/ireland-architectural-construction-engineering-and-inspection-services-sin) [Architectural, construction, engineering and inspection services – Būvprojekta izstrāde un autoruzraudzība fasādes siltināšanai kārtās Dzirciema ielā 16, Rīgā – 1.kārta, C korpuss · Rīgas Stradiņa universitāte · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a15183-3915-73d1-83e6-c378f9f7a926/latvia-architectural-construction-engineering-and-inspection-services-buvp) [Technical assistance services – Suivi et gestion de chantiers de réhabilitation de sites pollués · SPAQuE · 15 days left · 3 Nov 2026](https://tendernation.io/opportunities/01a15183-155e-73c2-a593-9e17375422ac/belgium-technical-assistance-services-suivi-et-gestion-de-chantiers-de-rehab) [Engineering design services for the construction of civil engineering works – Dokumentace pro povolení záměru stavby č. 9567 Radlická radiála JZM - Smíchov; v úseku MÚK Bucharova – MÚK Jinonice · Hlavní Město Praha · 15 days left · 3 Nov 2026](https://tendernation.io/opportunities/01a15183-0c15-72b2-bb19-c3ab1550e67e/czechia-engineering-design-services-for-the-construction-of-civil-engineering)