--- title: "Preliminary Market Engagement - MBGWS Boxes" ocid: "ocds-h6vhtk-0609b7" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0609b7" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0609b7.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0609b7.json" source: "Find A Tender Service" current_stage: "Planning" buyer: "SELLAFIELD LIMITED" published: "2026-05-29" --- # Preliminary Market Engagement - MBGWS Boxes Buyer: SELLAFIELD LIMITED Current stage: Planning OCID: ocds-h6vhtk-0609b7 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0609b7) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-0609b7.json) ## Summary Sellafield Limited has issued a preliminary market engagement notice to assess the capability and interest of suppliers in the production and delivery of Miscellaneous Beta Gamma Waste (MBGW) Boxes. This procurement falls under the industry categories of nuclear waste packaging and steel, with a focus on goods. The buying organisation, Sellafield Limited, is located in Warrington, UK, and operates under the classification of a sub-central public authority. The procurement stage is currently in the planning phase, with an engagement process seeking supplier feedback due by 12 June 2026. The engagement aims to understand the viability of a single supplier model, as well as mobilisation and delivery timelines, to inform the procurement strategy scheduled for further notice on 1 November 2026. This procurement presents significant opportunities for businesses involved in manufacturing and supplying complex engineered goods, particularly those with experience in the nuclear sector. Small and medium-sized enterprises (SMEs) might find this tender attractive due to its suitability criteria, which supports SME participation. With an anticipated contract value of £12 million to £14.4 million and a delivery demand of 11 to 33 units per annum over a five-year contract, this procurement could lead to substantial business growth. Firms with robust supply chain capabilities and experience in product introduction methodologies, such as Advanced Product Quality Planning (APQP), are well-positioned to compete successfully. The requirement for validating delivery models and mobilisation timelines further indicates an opportunity for businesses with strong project management skills to collaborate with Sellafield Ltd in aligning technical and commercial strategies. ## Notice This notice builds on the previous Preliminary Market Engagement (UK2 Notice reference: 004728-2026), published on 20 January 2026, which sought to assess supplier capability and market interest in the manufacture and supply of Miscellaneous Beta Gamma Waste (MBGW) Boxes. That engagement demonstrated a strong level of market interest and identified a number of capable suppliers. Sellafield Ltd is now undertaking a further phase of market engagement to refine its understanding of supplier capacity, mobilisation requirements, and commercial considerations in advance of finalising the procurement strategy. The current preferred delivery model is for the full assembly of MBGW Boxes by a single supplier. This engagement is intended to gather targeted feedback to validate this approach and inform the design of the forthcoming procurement. The requirement is expected to include the manufacture, assembly, testing, and delivery of Miscellaneous Beta Gamma Waste (MBGW) Boxes in accordance with Sellafield Ltd specifications and requirements. The anticipated demand profile remains within a range of approximately 11 to 33 units per annum, subject to confirmation. PLEASE NOTE THIS IS NOT A CALL FOR COMPETITION ### Planning Information Responding to the Expression of Interest To respond to this expression of interest, interested parties should respond in the Nuclear Decommissioning Authority (NDA) tendering portal Atamis https://atamis-2464.my.site.com/s/Welcome To access Click on View our Live Opportunities and search for C31446. Purpose of Engagement Sellafield Ltd is seeking to: -Confirm the attractiveness of a full assembly (single supplier) delivery model -Understand supplier mobilisation requirements and constraints -Assess whether proposed delivery timelines are achievable -Validate whether the anticipated volume range is commercially attractive Suppliers are invited to provide responses to the following questions: 1. Full Assembly Model Based on the information available, would your organisation consider a full assembly (single supplier) model to be an attractive opportunity? Please set out any conditions or factors that would influence your interest. 2. Mobilisation Period What mobilisation period would your organisation typically require for a requirement of this nature? Please outline the key activities that would drive this timeline (e.g. tooling, design validation, supply chain, recruitment, approvals). 3. 18-Month Mobilisation Feasibility Do you consider an 18-month mobilisation period to be sufficient to establish capability and commence compliant production? Please provide supporting rationale. If not, please indicate what mobilisation period you would consider achievable. 4. Volume and Demand Profile Is the anticipated volume range (circa 11–33 units per annum) considered commercially attractive? Please provide any comments on minimum viable volumes, batching, or production considerations. 5. Product Introduction Approach and Experience What experience does your organisation have in introducing new or technically complex products into production? Please outline any structured approaches or methodologies (e.g. New Product Introduction (NPI), Advanced Product Quality Planning (APQP), or similar) that you typically use, and how these support mobilisation and transition into production. 6. Additional Comments Please provide any additional observations that may help inform the procurement strategy, including risk areas or key considerations. Interested parties should respond to this by 12 June 2026. ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/050919-2026 | | Notice type | UK2 - Preliminary Market Engagement Notice | | Procurement type | Standard | | Procurement category | Goods | | Procurement method | Not Specified | | Procurement method details | Not specified | | Tender suitability | SME | | Awardee scale | Not specified | | All stages | Planning | ## Dates | Field | Value | | --- | --- | | Publication date | 29 May 2026 | | Submission deadline | Not specified | | Future notice date | 1 Nov 2026 | | Award date | Not specified | | Contract period | 30 Sep 2028 - 30 Sep 2033 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £12,000,000 | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Planned | | Lots status | Planned | | 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 | Not specified | ## CPV Codes ### Divisions - 14 - Mining, basic metals and related products - 90 - Sewage, refuse, cleaning and environmental services ### Codes - 14622000 - Steel - 90521520 - Packaging of intermediate level nuclear waste ## Release History - 29 May 2026 at 14:04 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/050919-2026 - 20 Jan 2026 at 11:37 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/004721-2026 ## Documents - https://www.find-tender.service.gov.uk/Notice/050919-2026 29th May 2026 - Preliminary market engagement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/004721-2026 20th January 2026 - 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-0609b7. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0609b7.json.