--- title: "MSSS Boxes Procurement" ocid: "ocds-h6vhtk-0554ec" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0554ec" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0554ec.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0554ec.json" source: "Find A Tender Service" current_stage: "Tender" buyer: "SELLAFIELD LIMITED" published: "2026-06-04" --- # MSSS Boxes Procurement Buyer: SELLAFIELD LIMITED Current stage: Tender OCID: ocds-h6vhtk-0554ec [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0554ec) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0554ec.json) ## Summary Sellafield Limited is actively engaged in the procurement process for the MSSS (Magnox Swarf Storage Silo) Boxes, intended for the manufacture and supply of these box assemblies as essential containers for waste materials. The procurement covers several industry categories including miscellaneous fabricated products, specifically positioning it within the regions of WordPress Warrington (UKD61) and delivery within the United Kingdom (UKD11). This process is currently in the tender update stage, with an active status and a competitive selective procurement method, adhering to the Procurement Act 2023. Key dates include the extended deadline for expression of interest by 10 July 2026, while clarifications need to be submitted by 29 June 2026. Three separate lots have been included in this £108 million project, spread over a contract term from July 2027 to July 2034. This procurement represents significant potential for business growth, particularly for enterprises specializing in manufacturing boxes for waste material storage, fabrications, and related sectors. The opportunity is well-suited to small and medium enterprises (SMEs) due to its emphasis on selective competitive procurement that enables various suppliers to tender. Given the project's complexity and risk level, companies keen to participate must design solutions that meet stringent safety and storage standards. With a total of three active lots, each company can bid on no more than three yet may only be awarded one under usual circumstances unless they are the sole compliant bidder within a lot, allowing diverse business opportunities across different capabilities and specialisations to flourish. ## Notice Procurement for the manufacture and supply of MSSS (Magnox Swarf Storage Silo) Box assemblies. Please refer to Sections 1 & 2 of the ITT Template CFP Document for further information. ### Lot Information Outer Box Outer Box: PS35M-PS41M MSSS - Skip MSSS - Skip: PS27M-PS32M Box & Skip Lids Box & Skip Lids Range: PS14-PS17M Lot 4 - TEST PURPOSES ONLY Lot 4 - TEST PURPOSES ONLY. This Lot has been created as a test, please note there are only 3 Lots in this procurement ### Planning Information A webinar is now available to view on Atamis (Ref: C26453) for the upcoming MSSS (Magnox Swarf Storage Silo) Boxes Procurement. The general themes of the webinar include: MSSS 3m3 Box Overview Procurement Strategy Terms & Conditions Quality Requirements Social Impact Tendering Hints & Tips There have been several other documents and drawings issued alongside the webinar. Further to this, it is anticipated that the Terms and Conditions will be added to Atamis on Tuesday 7th April. Please take the time to review all of the information provided and if you have any questions, please ensure they are submitted by COP Friday 17th April. All questions will be collectively responded to prior to the tender being issued. Suppliers interested in this webinar should register interest in Atamis reference C26453. https://atamis-2464.my.site.com/s/Welcome ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/052570-2026 | | 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 | Planning, Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 4 Jun 2026 | | Submission deadline | 26 Jun 2026 | | Future notice date | 30 Apr 2026 | | Award date | Not specified | | Contract period | 25 Jul 2027 - 25 Jul 2034 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £90,000,000 | | Lots value | £90,000,000 | | 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 | SELLAFIELD LIMITED | | Locality | WARRINGTON | | Post town | Warrington | | Postcode | WA3 6GR | | Country | England | | ITL 1 | TLD North West (England) | | ITL 2 | TLD6 Cheshire | | ITL 3 | TLD61 Warrington | | Local authority | Warrington | | Electoral ward | Birchwood | | Westminster constituency | Warrington North | | Delivery location | TLD11 West Cumbria | ## CPV Codes ### Divisions - 44 - Construction structures and materials; auxiliary products to construction (except electric apparatus) ### Codes - 44400000 - Miscellaneous fabricated products and related items - 44613800 - Containers for waste material ## Release History - 4 Jun 2026 at 08:00 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/052570-2026 - 22 May 2026 at 11:52 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/047818-2026 - 9 Apr 2026 at 14:28 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/032525-2026 - 1 Apr 2026 at 14:49 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/030504-2026 - 15 Jan 2026 at 09:07 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/003310-2026 - 27 Jun 2025 at 13:56 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/035846-2025 - 27 Jun 2025 at 10:38 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/035701-2025 ## Documents - https://www.find-tender.service.gov.uk/Notice/052570-2026 4th June 2026 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/047818-2026 22nd May 2026 - Tender notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/032525-2026 9th April 2026 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/030504-2026 1st April 2026 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/003310-2026 15th January 2026 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/035846-2025 27th June 2025 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/035701-2025 27th June 2025 - Pipeline notice on Find a Tender ## Notice URLs - https://atamis-2464.my.site.com/s/Welcome - https://www.gov.uk/government/organisations/sellafield-ltd - 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-0554ec. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0554ec.json.