--- title: "Engineering Vehicles - Tube Gauge Tamper" ocid: "ocds-h6vhtk-0688c6" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0688c6" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0688c6.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0688c6.json" source: "Find A Tender Service" current_stage: "Planning" buyer: "TRANSPORT FOR LONDON" published: "2026-04-22" --- # Engineering Vehicles - Tube Gauge Tamper Buyer: TRANSPORT FOR LONDON Current stage: Planning OCID: ocds-h6vhtk-0688c6 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0688c6) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0688c6.json) ## Summary Transport for London is engaging in a preliminary market engagement process regarding the engineering vehicles within the railway industry, specifically Tube Gauge Tampers, to be used on the London Underground's deep tube network. The procurement is at the planning stage, with milestones scheduled for May 20, 2026. This engagement aims to understand market capabilities and technical solutions to inform procurement strategy and is taking place in London, UK. Interested suppliers must register their interest and complete a Market Sounding Questionnaire to contribute non-binding feedback, which will aid Transport for London in shaping future procurement strategies. This tender offers promising opportunities for businesses specialising in railway maintenance and engineering vehicles, particularly those with experience in manufacturing and supporting on-track machinery capable of operating within constrained environments. Companies with expertise in innovative, low-emission propulsion systems, railway signalling integration, and long-term maintenance plans can significantly benefit from participating in this engagement. This preliminary process allows organisations to showcase their capabilities and potentially influence future procurement for Tube Gauge Tampers, contributing to growth and strengthening their partnership with Transport for London. ## Notice London Underground (LU) is proposing to undertake an Early Market Engagement (EME) that will facilitate the development of a suitable procurement strategy for the acquisition of a fleet of Tube Gauge Tampers which are essential for maintaining track geometry across LU's deep tube network, where tight curvature, restricted clearances and 4th rail traction supply impose unique operational constraints. LU currently operate a set of 3 Tube Gauge Tampers acquired in 1980, which are now beyond their design life, with limited OEM support and increasing obsolescence. To maintain safe track alignment, avoid Temporary Speed Restrictions (TSRs), and ensure long-term operational resilience, LU is exploring options for the replacement of the Tube Gauge Tampers. This Preliminary Market engagement aims to understand supplier appetite and technical capabilities, innovation and commercial considerations relating to the manufacture, supply, and long-term support of a new set of Tube Gauge Tampers. Feedback will help shape LU's procurement strategy, technical specification, delivery mode, and programme. The scope of this preliminary market engagement covers the potential procurement of new set of Tube Gauge Tampers capable of operating across the LU network, including deep tube tunnels, depots and subsurface interfaces. The indicative scope include: * Functional and operational requirements * Environmental Performance * Signalling System integration * Operational & Functional Requirements * Maintenance, Support and Lifecycle Considerations Functional and operational requirements: * Operating within a modified LG1 kinematic gauge profile. This is a particularly challenging gauge profile that will enable the tamper to go anywhere on the LU network. * 1,435 mm gauge track to ensure interoperability of LU assets on mainline infrastructure. * Navigating minimum horizontal curve radius of 64 m (with some curves down to 46 m in depots). * Operating on maximum gradients of 3.4%. * Achieving a maximum speed of 60 mph (self-propelled or hauled). * Utilise LU's two-line brake system and electronic brake control system along with DropHead Buckeye coupler to ensure compatibility for locomotive haulage. The current operational philosophy assumes the tamper will be loco hauled in Running Mode. * Delivering tamping functionality for plain line and points & crossings. Inclusive of conductor rails and checkrails. * Tampers that meet the fire requirements for operating in a tunnel environment. Consideration will need to be made to exit the tamper longitudinally in the event of a fire. Environmental Performance In line with LU's carbon reduction drive, consideration should be placed on Tube Gauge Tampers that are: * Hybrid, battery, or alternative low-emission propulsion. * Euro V or better diesel engines (if diesel is proposed). * Reduced carbon footprint across design, manufacture, and transport. Signalling System Integration The current operational philosophy assumes that the tampers will be loco hauled in Running Mode which reduces the number of signalling systems required to be fitted to the tamper. At this stage the suppliers should consider spatial and technical constraints for integrating a Tripcock signalling system which interfaces with the braking system. Operational & Functional Requirements The new tampers should: * Support rapid set up and stow to maximise productivity during engineering hours. * Provide emergency recovery capability allowing safe towing in the event of power failure. * Achieve a 25-year service life. * Be compatible with LU battery locomotive haulage. Maintenance, Support and Lifecycle Considerations Suppliers are invited to provide: * Maintenance plans and man hour estimates. * Expected overhaul cycles. * Availability of long- term parts support. * Opportunities for modularisation, remote diagnostics, or reliability improvements. Commercial, Programme and Market Information TfL seeks indicative (non- binding) information on: * Guide pricing for the tampers. LU anticipates procuring at least one tamper, with the option to procure additional units depending on budget, operational need, and value for money. Suppliers are encouraged to indicate how pricing may scale for the supply of 1, 2, or 3 units. * Production lead times, Design development durations and delivery programmes. * Key risks, opportunities, and market constraints. * Supplier appetite to participate in a future tender. ### Planning Information Suppliers wishing to participate in this preliminary market engagement should register their interest by contacting: Sam Ward Commercial Manager Email: samward1@tfl.gov.uk Suppliers expressing an interest in participating will be required to complete and submit an Early Market Engagement Market Sounding Questionnaire (MSQ). The MSQ will be used to gather non‑binding information to support TfL's understanding of the market, supplier capability, technical solutions, delivery approaches and whole‑life considerations relating to Tube Gauge tamping machines. Participation is open to organisations with the relevant technical capability and experience to design, manufacture and support specialist on‑track railway maintenance plant, including tamping machines suitable for operation within constrained gauge, tunnel and mixed‑infrastructure environments. Responses submitted as part of the MSQ will not form part of any subsequent tender or procurement process, and participation in this market engagement does not constitute a commitment by TfL to proceed with a future procurement. All information provided will be treated in confidence and used solely to inform TfL's future procurement strategy. Participation will not confer any advantage or disadvantage in any future competition. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/036700-2026 | | Notice type | UK2 - Preliminary Market Engagement Notice | | Procurement type | Standard | | Procurement category | Goods | | 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 | 22 Apr 2026 | | Submission deadline | Not specified | | Future notice date | 20 May 2026 | | Award date | Not specified | | Contract period | 1 Mar 2028 - 1 Aug 2035 | | 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 | TRANSPORT FOR LONDON | | Locality | LONDON | | Post town | East London | | Postcode | E20 1JN | | Country | England | | ITL 1 | TLI London | | ITL 2 | TLI4 Inner London - East | | ITL 3 | TLI41 Hackney and Newham | | Local authority | Newham | | Electoral ward | Stratford Olympic Park | | Westminster constituency | Stratford and Bow | | Delivery location | TLI London | ## CPV Codes ### Divisions - 34 - Transport equipment and auxiliary products to transportation ### Codes - 34600000 - Railway and tramway locomotives and rolling stock and associated parts ## Release History - 22 Apr 2026 at 14:13 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/036700-2026 ## Documents - https://www.find-tender.service.gov.uk/Notice/036700-2026 22nd April 2026 - 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-0688c6. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0688c6.json.