--- title: "RIIO-GT3 Control System Replacement FEED Framework Expression of Interest" ocid: "ocds-h6vhtk-05e73f" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05e73f" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05e73f.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05e73f.json" source: "Find A Tender Service" current_stage: "Planning" buyer: "NATIONAL GAS TRANSMISSION PLC" published: "2025-11-24" --- # RIIO-GT3 Control System Replacement FEED Framework Expression of Interest Buyer: NATIONAL GAS TRANSMISSION PLC Current stage: Planning OCID: ocds-h6vhtk-05e73f [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05e73f) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-05e73f.json) ## Summary The procurement process initiated by National Gas Transmission PLC (NGT) is currently in the planning stage, focusing on the RIIO-GT3 Control System Replacement FEED Framework. This preliminary market engagement seeks expressions of interest for the future procurement activities related to the replacement and enhancement of control systems in compressor stations. The industry category for this tender is engineering services, under the utility special regime. Key milestones include expressing interest by 17 December 2025. Located in Warwick, UK, NGT is responsible for managing the National Transmission System, ensuring its safety and reliability while adhering to cyber security standards. This tender presents significant opportunities for businesses specialising in engineering services, particularly those with expertise in modernising control systems and enhancing cyber resilience. Businesses experienced in infrastructure projects, cyber security, and adherence to national and international standards would be well-positioned to compete. Engaging in this procurement process can offer a pathway to long-term collaboration with NGT, given the extensive contract period from June 2026 to June 2034. Interested participants should engage early by requesting the response template and anticipate potential future competitions through platforms like Achilles UVBD for registration. ## Notice This notice is published to advertise a preliminary market engagement exercise being conducted by National Gas Transmission PLC ("NGT"). NGT is seeking expressions of interest and feedback from the market to support and refine its approach to a forthcoming procurement process in respect of the RIIO-GT3 Control System Replacement FEED Framework. Who are NGT NGT play a vital role in delivering gas to millions of people across Great Britain. NGT owns, manages, and operates the National Transmission System ("NTS") in Great Britain, making gas available when and where it's needed. NGT ensure that the network is safe, reliable and available, and that it delivers value for our customers and stakeholders, while minimising impact on the environment. What is the Control System Replacement Programme The overarching scope of each project in the programme is the complete replacement and upgrading of the compressor station's control systems to enhance cyber resilience. This involves modernising legacy infrastructure, implementing robust cybersecurity measures, and ensuring that the control systems are capable of withstanding evolving digital threats. The upgrades are intended to safeguard operational integrity, protect critical assets, and align with national and international standards for cyber-secure infrastructure. RIIO-GT3 Control System Replacement FEED Framework As NGT approaches the end of RIIO-GT2, it is preparing for its next regulatory period RIIO-GT3 which will cover April 2026 - March 2031. For RIIO-GT3 NGT is exploring an alternative delivery model for the remaining projects in the control system replacement programme, whereby a FEED Partner(s) would be appointed to carry out each projects FEED study. The FEED stage defines the technical, safety, cyber, and operational requirements for the full replacement of control systems across the site, ensuring compliance with NGT standards and NIS Directive obligations. How to express an interest Interested parties are to express an interest by completing and returning the response template. Please request the response template from callum.sparks@nationalgas.com. Additional Information Any subsequent competition will be issued using Achilles UVBD (achilles.com) therefore current registration is advised. ### Planning Information Interested parties are to express an interest by completing and returning the response template. Please request the response template from callum.sparks@nationalgas.com. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/076412-2025 | | Notice type | UK2 - Preliminary Market Engagement Notice | | Procurement type | Standard | | Procurement category | Services | | Procurement method | Not Specified | | Procurement method details | Not specified | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Planning | ## Dates | Field | Value | | --- | --- | | Publication date | 24 Nov 2025 | | Submission deadline | Not specified | | Future notice date | 17 Dec 2025 | | Award date | Not specified | | Contract period | 7 Jun 2026 - 7 Jun 2034 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | Not specified | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Planning | | Lots status | Planning | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | NATIONAL GAS TRANSMISSION PLC | | Locality | WARWICK | | Post town | Coventry | | Postcode | CV34 6DA | | Country | England | | ITL 1 | TLG West Midlands (England) | | ITL 2 | TLG1 Herefordshire, Worcestershire and Warwickshire | | ITL 3 | TLG13 Warwickshire CC | | Local authority | Warwick | | Electoral ward | Warwick Myton & Heathcote | | Westminster constituency | Warwick and Leamington | | Delivery location | Not specified | ## CPV Codes ### Divisions - 71 - Architectural, construction, engineering and inspection services ### Codes - 71300000 - Engineering services ## Release History - 24 Nov 2025 at 11:59 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/076412-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/076412-2025 24th November 2025 - Preliminary market engagement notice on Find a Tender ## Notice URLs - https://www.legislation.gov.uk/ukpga/2023/54/contents ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05e73f. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-05e73f.json.