--- title: "Rolling stock filters" ocid: "ocds-h6vhtk-0693d4" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0693d4" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0693d4.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0693d4.json" source: "Find A Tender Service" current_stage: "Tender" buyer: "THE CHILTERN RAILWAY COMPANY LIMITED" published: "2026-05-07" --- # Rolling stock filters Buyer: THE CHILTERN RAILWAY COMPANY LIMITED Current stage: Tender OCID: ocds-h6vhtk-0693d4 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0693d4) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0693d4.json) ## Summary The Chiltern Railway Company Limited has initiated a tender process for the procurement of rolling stock filters, essential for maintaining its fleet used across various routes in the UK. This active tender, titled "Rolling stock filters," falls within the goods category and is part of the industry concerning parts of locomotives and rolling stock. The procurement is under a competitive flexible procedure and follows a selective procurement method. The process involves multiple stages, with an expression of interest deadline set for 5th June 2026 and an award period concluding on 14th August 2026. The contract is expected to start on 14th September 2026 and run until 13th September 2031, with possible extensions. Deliveries will be made across multiple regions including UKC, UKD, UKE, UKF, UKG, UKH, UKI, UKJ, and UKK. This tender presents a substantial opportunity for businesses capable of supplying a full range of specified filters necessary for the maintenance of Chiltern Railways' diesel multiple units and diesel loco hauled Mk5a coach stock. Companies that specialise in manufacturing or supplying train components, particularly those with experience in supplying manufacturer-recommended parts to uphold warranties, would find this opportunity aligned with their expertise. Given the strategic significance of the procurement across multiple UK regions and the potential contract value of up to £1,008,000, it offers considerable growth prospects for SMEs that can meet the selective procurement criteria and sustain product quality and timely supply throughout the contract term. ## Notice Chiltern Railways operates commuter/regional rail passenger services from its central London terminus at London Marylebone along the M40 corridor to destinations in Buckinghamshire, Oxfordshire and Warwickshire, as well as long-distance services to the West Midlands along two routes. Services on the Chiltern main line run from London Marylebone to Birmingham Snow Hill, Stratford-upon-Avon and Oxford, with some peak-hour services to Kidderminster. Chiltern Railways also runs trains on the London to Aylesbury Line to Aylesbury (with some trains terminating at Aylesbury Vale Parkway instead), on the Princes Risborough to Aylesbury and Oxford to Bicester branch lines. This Procurement also covers East West Railway from Oxford to Bletchley or any other extensions that Chiltern Railways are contracted to operate. Chiltern Railways operates a mixed fleet of rolling stock to fulfil its rail passenger services. The fleet consists of both diesel multiple units (DMUs) and diesel loco hauled Mk5a coach stock. The fleet maintenance plan set out what maintenance tasks are required for the rolling stock and at what maintenance periodicities. The maintenance tasks include changing various fluids and filters to ensure the safe operation and maintain the performance of the fleet. As such Chiltern Railways require one contract to supply these filters to ensure continuity of supply, so that the maintenance tasks are performed at the correct intervals. To protect manufacturer warranties, only the manufacturer's recommended filters can be used which forms the specifications of this ITT. Only the filter makes and part numbers identified in the specifications are to be supplied and no substitutions will be accepted. Bidders must be capable of supplying all products within the basket of goods that make up the Specifications. No bids will be accepted where a Bidder is not able to supply all the product types that make up the specifications. Chiltern Railways will place orders for the products throughout the term of the agreement so that sufficient inventory levels can be maintained at its maintenance sites accordingly. ### Lot Information Lot 1 Options: The manufacturer of the components that use the filters may change the specifications and or the approved filters for the components. If this risk materialises then Chiltern Railways will need to modify the specifications to include supply of the revised filter(s). The manufacturer of the filters specified in the Specifications may modify the design of the filters. If this risk materialises then Chiltern Railways will need to modify the specifications to include supply of the revised filter(s). The manufacturer of the filters specified in the specifications may cease to manufacture a filter in the specifications. If this risk materialises then Chiltern railways will need to modify the specifications to include supply of an alternative or revised filter(s). Renewal: There is an option to extend the contract by 12-months if both parties agree. The extension must be agreed within 1 month prior to the expiry of the intial contract term. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/042134-2026 | | Notice type | UK4 - Tender Notice | | Procurement type | Standard | | Procurement category | Goods | | Procurement method | Selective | | Procurement method details | Competitive flexible procedure | | Tender suitability | SME | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 7 May 2026 | | Submission deadline | 22 May 2026 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | 13 Sep 2026 - 13 Sep 2031 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £840,000 | | Lots value | £840,000 | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Active | | Lots status | Active | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | THE CHILTERN RAILWAY COMPANY LIMITED | | Locality | SUNDERLAND | | Post town | Sunderland | | Postcode | SR3 3XP | | Country | England | | ITL 1 | TLC North East (England) | | ITL 2 | TLC4 Northumberland, Durham and Tyne & Wear | | ITL 3 | TLC44 Sunderland | | Local authority | Sunderland | | Electoral ward | Doxford | | Westminster constituency | Houghton and Sunderland South | | Delivery location | TLC North East (England), TLD North West (England), TLE Yorkshire and The Humber, TLF East Midlands (England), TLG West Midlands (England), TLH East (England), TLI London, TLJ South East (England), TLK South West (England) | ## CPV Codes ### Divisions - 34 - Transport equipment and auxiliary products to transportation ### Codes - 34631000 - Parts of locomotives or rolling stock ## Release History - 7 May 2026 at 15:29 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/042134-2026 ## Documents - https://www.find-tender.service.gov.uk/Notice/042134-2026 7th May 2026 - Tender notice on Find a Tender ## Notice URLs - http://www.chilternrailways.co.uk - https://marketdojo.com/market-dojo-sign-up/ - https://marketdojo.com/market-dojo-sign-up/MarketDojo-ePorcurementplatformUseInvitationCode:66D2CCBBC7toaccesstheeventandtenderdocuments. - 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-0693d4. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0693d4.json.