Open27 days left · express interest by midday, Monday 26 October 2026

Supply of HEPA Filters

Sellafield Limited · Local or regional public body

In brief

Sellafield Limited is looking for suppliers for this contract (North West).

The estimated value is £6,500,000 excluding VAT.

The contract runs for 5 years, starting 1 July 2027.

It is split into 2 lots, so a supplier can bid for part of the work.

The buyer says it is suitable for small and medium-sized businesses.

This is the first stage: register your interest by midday, Monday 26 October 2026, and shortlisted suppliers are invited to bid.

Built from the notice's own fields. Always check the official notice before you bid.

Can I win this?

Key dates

Express interest by: midday, Monday 26 October 2026
Questions by: midday, Monday 26 October 2026

This is the first stage. You register interest now, and shortlisted suppliers are invited to bid later.

How bids are scored

Technical 60% · Social Value 10% · Commercial 30%

Quality matters most. You can win without being the cheapest.

Competition

Typical: a median of 3 bids per contract for this buyer (from 14 awards in the last 12 months).

The buyer expects to buy this again around January 2027.

What the notice says

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 https://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.

Should I bid?

Tick what applies to you. Nothing is saved.

Can you prepare a good bid in 27 days?Leave time for clarification questions and sign-off.
Is a contract of about £6,500,000 a size you can deliver?Buyers often check that your turnover is comfortably larger than the yearly contract value.
Can you deliver in North West?Check the delivery locations in the tender documents.
Is one of the 2 lots a good fit?You can usually bid for one lot without bidding for the others.
Are you registered on the Central Digital Platform?You need to be registered to take part under the Procurement Act 2023.
The buyer says this suits small businesses.A good sign if you are an SME, but check the requirements.

How to bid

Read the full notice on Find a Tender, including any tender documents it links to.
Register your organisation on the Central Digital Platform (through Find a Tender) if you have not already. Suppliers need to be registered to take part in procurements under the Procurement Act 2023.
Submit your bid through the buyer's e-tendering portal: atamis-2464.lightning.force.com.
Send clarification questions before midday, Monday 26 October 2026.
Register your interest before midday, Monday 26 October 2026. Shortlisted suppliers are then invited to bid.

Lots

Lot	Trade	Value
Lot 1 1 July 2027 to 30 June 2032 What this lot covers 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)	—	£270,000
Lot 2 1 July 2027 to 30 June 2032 What this lot covers 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	—	£4,100,000

Timeline

15 April 2026Planned procurement notice · UK3, notice 034231-2026
12 May 2026Preliminary market engagement notice · UK2, notice 043551-2026
16 September 2026Tender notice · UK4, notice 087836-2026

About the buyer

Sellafield LimitedLast 12 months

Procurements

243

Awards

200

Suppliers it has used most

Gunnebo Entrance Control Ltd7 contracts
Core Nuclear Solutions Ltd6 contracts
Induchem UK Ltd5 contracts
Thomas Graham & Sons Ltd5 contracts
Jasun Technology Limited4 contracts
Mirion Technologies (IST) Ltd4 contracts
Nuvia4 contracts
Phoenix Dosimetry Ltd4 contracts

All tenders and awards from Sellafield Limited

From notice 034231-2026 on Find a Tender, first published 15 April 2026, last updated 16 September 2026. We last checked for changes on 28 September 2026.