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Published 15 Apr 2025, 15:23 BST

Official UK procurement notice

Supply of HEPA Filters · UK public procurement notice

Official notice

Authority: Sellafield Limited (Public body)

Framework agreement2 lotsGoodsCompetitive flexible procedureAbove thresholdSME suitableMax 1 lot per supplier
Sectors: Industrial machinery (42) Delivery: North West (UKD1)
Framework ceiling (notional)£6,500,000total for 2 lots · framework ceiling, not attributable revenue · 4 value updates
Submissions closed 26 Oct 2026
Lots 2max 1 won per supplier
Framework period 5 yrsends 30 Jun 2032 · starts 1 Jul 2027

What is being bought2 lots · detail below

Published requirement description

The Detailed Design, Manufacture, Test, Supply and Delivery of Nuclear Grade Air Filters, including High Efficiency Particulate Air (HEPA) Filters to the NDA Operating Companies; Sellafield Ltd, NRS and NRS Dounreay.

All HEPA Filter items produced must meet the relevant Sellafield Ltd specifications.

The items will be ordered as required as call off orders and there is no guarantee of volumes. There is a requirement for type testing across the goods specifications.

Full specifications and procurement documents for this tender are available to interested parties who register on Atamis project C8489, details on how to do this are contained within this notice.

A preliminary Market Engagement (UK2) Notice has not been issued ahead of this Tender (UK4) Notice, this is because a Prior Information Notice (PIN) was issued in January 2025 to inform the market of a Market Engagement Event that was held, a link to this notice is contained in the following link www.find-tender.service.gov.uk/Notice/001878-2025 ↗

The event was run in May 2025. A copy of the presentation slides delivered during this market engagement event have been uploaded into Atamis Project C8489, under the Documents Folder 0. Market Engagement.

  • The authority expects to re-tender this requirement around 27 May 2026, 23:59 BST.
  • How the procedure runs: Full details of the Competitive Flexible Procedure can be located within the ITT and corresponding tender documents.

CPV: Air filters

How this framework works

From the published notice
Framework period
5 yrs from 1 Jul 2027

Lots and requirements (2)Procurement structure

2 lots · all with a published value · win at most 1 of them · same evaluation weights on every lot
Lot #1Lot 1 – Smaller Basket comprising of the following items: 5 yrsSMEPublished value£270,000

Lot 1 – Smaller Basket comprising of the following items:

  • Mini Pleat HEPA Filters. Unmodified. Type I & II
  • Large Circular Filters (Internal and External Seal) stainless steel case
  • Large Circular Filters (Internal Seal) PU case.
  • In line canister filters (flanged)
  • Push through HEPA filters (stainless steel case)
Contract period: 1 Jul 2027 – 30 Jun 2032 (5 yrs)Value: £270,000 exc. VAT · £2,700,000 inc. VAT
Delivery: North WestEligibility: SME eligible
42514310 Air filters
Lot #2Lot 2 – Larger Basket comprising of the following items: 5 yrsSMEPublished value£4,100,000

Lot 2 – Larger Basket comprising of the following items:

  • Deep pleat HEPA Filters (with and without features)
  • Mini-pleat filters modified with lifting features & attachments
  • Large Circular HEPA filters mild steel (Internal & external Seal)
  • In line Canister HEPA Filters (screwed)
  • In line Canister HEPA Filters (painted mild steel)
  • Specialist HEPA Filters & accessories
  • Small HEPA Filters
Contract period: 1 Jul 2027 – 30 Jun 2032 (5 yrs)Value: £4,100,000 exc. VAT · £4,100,000 inc. VAT
Delivery: North WestEligibility: SME eligible
42514310 Air filters

What it takes to win
i

How this buyer will score bids.

The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).

Evaluation split and conditions of participation as published; the tender pack may add more
How bids were scored · same split on all 2 lots
Quality: 60%Price: 30%Social value: 10%
Published sub-criteria (3)
  • Technical: 60%
  • Commercial: 30%
  • Social Value: 10%
Published award criteria (3)
  • Technical
  • Social Value
  • Commercial
Lot distribution rule: Suppliers can submit a bid for both lots, however must state their lot preference and can only be awarded a maximum of 1 lot.
What this means for your bid
  • Price carries 30 of 100 points: a 10% discount moves about 3 points. The method statement decides this lot, not the discount.
  • “Supply of HEPA Filters” is a framework: the contest is a place on its panel, not a single contract.

Price arithmetic assumes straight proportional scoring; the tender pack may use another formula.

Procedure terms & legal framework

From the official record
Procedure method
Competitive flexible procedure
Legal basis
UKPGA · 2023/54 Procurement Act 2023
Procurement category
Goods
Notice status
Closed
Procurement threshold
Above threshold (FTS publication)
Regulatory regime
Standard
Commercial structure
Framework agreement
Who may use this agreement
Not stated in the notice; call-off rights may be limited to the establishing authority
Competition type
Competitive procedure
GPA / WTO covered
Yes (GPA)
Recurring procurement
Yes · next expected 27 May 2026
First published
15 Apr 2025, 15:23 BST
Last source update
16 Sept 2026, 14:51 BST
Award evaluation window
Submission end – 8 Jan 2027
Authority reference
C8489
FTS notice number
2026/S 000-087836
Latest notice
Tender notice (UK4)
Classification (CPV)
Air filters
Delivery area
North West (UKD1)
Official registry OCID
ocds-h6vhtk-050366 Find a Tender
How it runs

Full details of the Competitive Flexible Procedure can be located within the ITT and corresponding tender documents.

How it was run

Official notice
Run through: Atamis (Health Family) · Who buys & how to bid on Atamis
Supplier login requiredElectronic submission allowedLanguage: EN
Access & registration note: Free · one account PER buying organisation portal · password resets come "from Salesforce.com" (check spam)
Requests to participate (first stage)
26 Oct 2026, 12:00 GMT
Appointment period ends
26 Oct 2026, 12:00 GMT
Clarification deadline
26 Oct 2026, 12:00 GMT
Submission channel
Official e-sourcing portal
Electronic submission
Allowed
Accepted languages
en
Detailed submission instructions & authority contactsFrom official release

atamis-2464.lightning.force.com ↗

Timeline

15 Apr 2025 → 1 Jul 2027 · 8 dates
  1. Planning notice published
    15 Apr 2025, 15:23 BST
  2. Next notice expected174 days ago
    6 May 2026, 23:59 BST
  3. Market engagement158 days ago
    22 May 2026, 23:59 BST

    Prior to the publication of the forthcoming HEPA Filters Tender, Sellafield Ltd is reviewing the initially proposed procurement strategy and the market feedback received during earlier market engagement activities.

    This review is being undertaken to ensure that the procurement approach taken is appropriate for both the supply market and The NDA Group Operating Companies.

    As part of this process, Sellafield Ltd is seeking to re-engage with the market to validate and further understand supplier views on specific elements of the proposed strategy.

    In particular, feedback is invited on the following areas:

    1. Contracting Strategy

    Supplier views are requested on the suitability and viability of a dual source contracting model (i.e. the appointment of two suppliers) for the scope of HEPA Filters.

    1. Proposed Lotting Structure

    Supplier feedback is requested on the following indicative lotting structure, should a two supplier model be adopted:

    Lot 1 – Smaller Basket, comprising:

    • Mini Pleat HEPA Filters. Unmodified. Type I & II
    • Large Circular Filters (Internal and External Seal) stainless steel case.
    • Large Circular Filters (Internal Seal) PU case.
    • In line canister filters (flanged)
    • Push through filters (stainless steel case)

    Lot 2 – Larger Basket, comprising:

    • Deep pleat HEPA Filters (with and without features)
    • Mini-pleat filters modified with lifting features & attachments
    • Large Circular HEPA filters (Internal and external Seal) mild steel casing.
    • In line Canister HEPA Filters (screwed)
    • Push through filters (mild steel and PU case)
    • Specialist HEPA Filters & accessories
    • Small HEPA Filters

    Responses to this market engagement will help inform Sellafield Ltd’s ongoing strategy development. Participation in this exercise is voluntary and does not form part of any formal procurement process, nor does it create any commitment to proceed in line with the approaches outlined above.

    Please respond via an Atamis message against Atamis record Reference C21795 which is used for market engagement only (See the following Atamis portal Link) atamis-2464.lightning.force.com ↗.

    Interested suppliers are to register against project C21795, access the document in the folder titled 'Request for Information (RFI) Version 2.0' and then send your completed response via the Atamis messaging portal.

    Please also register against Atamis Project C8489 for the upcoming tender using the link provided.

    If you encounter any issues in doing this, please forward your response directly to jasmine.lane@sellafieldsites.com

    The deadline for providing your feedback is Friday 22nd May at BST 16.00

  4. Tender notice published42 days ago
    16 Sept 2026, 14:51 BST
  5. Clarification questions by2 days ago
    26 Oct 2026, 12:00 GMT
  6. Admission / appointment period ends2 days ago · period end, not a bid countdown
    26 Oct 2026, 12:00 GMT
  7. Today
    28 Oct 2026
  8. Award decision expected byin 72 days
    8 Jan 2027, 23:59 GMT
  9. Contract startsin 245 days
    1 Jul 2027, 00:00 BST

Notice history

8 events · 5 releases on Find a Tender · since 15 Apr 2025
  1. Preliminary market engagement notice published
    15 Apr 2025, 15:23 BST
    UK2
  2. Pipeline notice published
    8 May 2025, 09:39 BST
    UK1
  3. Planned procurement notice published
    15 Apr 2026, 13:55 BST
    UK3
  4. Procurement method changed
    15 Apr 2026, 13:55 BST
  5. Preliminary market engagement notice published
    12 May 2026, 15:28 BST
    UK2
  6. Published value updated to £6,500,000
    12 May 2026, 15:28 BST
    was £6,977,251
  7. Tender notice published
    16 Sept 2026, 14:51 BST
    UK4
  8. Status changed to active
    16 Sept 2026, 14:51 BST
Routine re-releases (5)
  • 2025-05: 1 release · 8 May 2025
  • 2025-04: 1 release · 15 Apr 2025

Contracting authority & participating public bodies

Sellafield Limited

Contracting authorityPublic authority - sub-central government GB-PPON: PWYP-8439-MZWY Hinton House, Birchwood Park Avenue, Warrington, North West, WA3 6GRContact name, email

Official documents & specifications (5)

Official links; attachments are not copied

Notices published for this procedure