--- title: "External Supplier Audit (Lot 1 & Lot 2)" ocid: "ocds-r6ebe6-0000834384" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-r6ebe6-0000834384" markdown_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000834384.md" json_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000834384.json" source: "Public Contracts Scotland" current_stage: "Tender" buyer: "CALEDONIAN SLEEPER LIMITED" published: "2026-06-10" --- # External Supplier Audit (Lot 1 & Lot 2) Buyer: CALEDONIAN SLEEPER LIMITED Current stage: Tender OCID: ocds-r6ebe6-0000834384 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-r6ebe6-0000834384) [Download OCDS JSON](https://d3tenders.com/contract/ocds-r6ebe6-0000834384.json) ## Summary Caledonian Sleeper Limited is currently in the tender stage of a procurement process aimed at securing independent audit and assurance services. This process, titled "External Supplier Audit (Lot 1 & Lot 2)," targets the Transport/Rail industry category and spans locations across the UK. The procurement method used is a restricted procedure, which involves selective tender bidding. Interested suppliers need to submit their electronic proposals by 11:00 AM on 13th July 2026. With a focus on services, the procurement is managed by Caledonian Sleeper Limited, based in Inverness, Scotland, and provides a structured opportunity for qualifying suppliers to deliver audit services related to the company's operations and partnerships. This tender presents significant business growth opportunities for firms specialising in audit and risk management services, particularly those with experience in rail transport operations. The contract is split into two lots, both requiring a thorough assessment of operational, engineering, and governance controls within the rolling stock maintenance and supply chain, as well as the interfaces between Caledonian Sleeper Limited and GB Railfreight. Firms with the capability to conduct structured, risk-based audits and those well-versed in maintaining high safety and operational standards are especially suited to compete. Companies have the flexibility to bid for one or both lots, with a possible contract duration extending to four years under certain conditions, underpinning long-term strategic partnerships. ## Notice Caledonian Sleeper Limited (CSL) is seeking to appoint a suitably qualified provider(s) to deliver independent audit and assurance services across two distinct but related requirements. ### Lot Information Supplier Audit Programme - Lot 1 This Lot covers the delivery of independent, risk-based supplier audits across CSL's rolling stock maintenance and materials supply chain. The appointed supplier will undertake two structured audits across key supplier sites, CAF and Alstom. Assessing operational, engineering and governance controls, including compliance with contractual, regulatory and ethical requirements. Renewal: 24 months fixed with option to extend for additional 12 months CSL / GBRf Joint Interface Audit Lot 2 This Lot covers the delivery of an independent joint audit between CSL and its traction provider, GB Railfreight (GBRf). The audit will assess the effectiveness of operational, engineering and safety-critical interfaces between both organisations, ensuring risks are appropriately managed in a shared operating environment. Renewal: 12 months with an option to extend for additional 12 months ## Key Details | Field | Value | | --- | --- | | Publication source | Public Contracts Scotland | | Latest notice | https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN557733 | | Notice type | PCS Notice - Website Contract Notice | | Procurement type | Standard | | Procurement category | Services | | Procurement method | Selective | | Procurement method details | Restricted procedure | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 10 Jun 2026 | | Submission deadline | 13 Jul 2026 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | Not specified | | 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 | Active | | Lots status | Active | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | CALEDONIAN SLEEPER LIMITED | | Locality | INVERNESS | | Post town | Inverness | | Postcode | IV1 1PP | | Country | Scotland | | ITL 1 | TLM Scotland | | ITL 2 | TLM2 Highlands and Islands | | ITL 3 | TLM20 Highlands and Islands | | Local authority | Highland | | Electoral ward | Inverness Central | | Westminster constituency | Inverness, Skye and West Ross-shire | | Delivery location | Not specified | ## CPV Codes ### Divisions - 79 - Business services: law, marketing, consulting, recruitment, printing and security ### Codes - 79212000 - Auditing services ## Release History - 10 Jun 2026 at 00:00 - Tender - PCS Notice - Website Contract Notice - https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN557733 ## Documents - https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN557733 External Supplier Audit (Lot 1 & Lot 2) - Caledonian Sleeper Limited (CSL) is seeking to appoint a suitably qualified provider(s) to deliver independent audit and assurance services across two distinct but related requirements. ## Notice URLs - http:// - http://www.publiccontractsscotland.gov.uk - http://www.sleeper.scot - https://api.publiccontractsscotland.gov.uk/v1/Notice?id=ocds-r6ebe6-0000834384 - https://www.publiccontractsscotland.gov.uk/ESPD/ESPD_Download.aspx?id=834384 - https://www.publiccontractsscotland.gov.uk/Search/Search_Switch.aspx?ID=834384 - https://www.publiccontractsscotland.gov.uk/sitehelp/help_guides.aspx ## 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-r6ebe6-0000834384. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-r6ebe6-0000834384.json.