Open25 days left · closes 1pm, Tuesday 8 December 2026

UKNNL - Fabrication, Machining, Associated Supplies and Services Open Framework

United Kingdom National Nuclear Laboratory Limited · Local or regional public body

In brief

United Kingdom National Nuclear Laboratory Limited is looking for suppliers for construction and building maintenance work (UK-wide).

It is a framework worth up to £15,000,000 excluding VAT: the most the buyer expects to spend across all suppliers, not one contract.

The contract runs for 4 years, up to 8 years with extensions, starting 8 March 2027.

It is split into 5 lots, so a supplier can bid for part of the work.

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

Bids close at 1pm, Tuesday 8 December 2026.

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

Can I win this?

Key dates

Questions by
1pm, Wednesday 2 December 2026
Bids by
1pm, Tuesday 8 December 2026

How bids are scored

Non-Nuclear Rig Fabrication and Machining

Technical 100%

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

Nuclear Rig Fabrication

Technical 100%

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

Infrastructure Fabrication and Machining & Engineering Systems

Technical 100%

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

Associated Supplies, Products, Services & Technical Support

Technical 100%

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

1 more lot is scored in the official notice.

Competition

Usually high: a median of 12 bids per contract for this buyer (from 13 awards in the last 12 months).

Framework

Winning puts you on a list of suppliers the buyer can call on; it does not guarantee work. The £15,000,000 is the most the buyer expects to spend across all suppliers over the framework's life, not one contract.

What the notice says

The framework has the ability to award contracts through restricted quick quotes, open quick quotes, mini competition and direct award. Call-off contracts can be either fixed cost or cost reimbursable. Mini-Competition Where mini-competition is used, this is to be via the e-tender portal and must include all suppliers on the applicable lot. Each mini competition will be restricted to only one Lot. Should requirements at call-off not have been priced at point of framework creation, mini-competition should be held allowing all suppliers in the applicable Lot to price, accordingly, providing the additional requirement fits within the overall subject matter of the applicable Lot.…Read the full description
The framework has the ability to award contracts through restricted quick quotes, open quick quotes, mini competition and direct award. Call-off contracts can be either fixed cost or cost reimbursable. Mini-Competition Where mini-competition is used, this is to be via the e-tender portal and must include all suppliers on the applicable lot. Each mini competition will be restricted to only one Lot. Should requirements at call-off not have been priced at point of framework creation, mini-competition should be held allowing all suppliers in the applicable Lot to price, accordingly, providing the additional requirement fits within the overall subject matter of the applicable Lot. Mini-competition criteria must not repeat qualification questions. The evaluation criteria must however comprise of the following, with weighting allowances adhered to: Evaluation Criteria Range • Pricing 5-90% • Technical 5-90% • Social Value 5-90% Mini competitions can be ran using both the Open Procedure and the Competitive Flexible Procedure under the Procurement Act 2023, where the call-off is above threshold. The Framework Agreement permits contracts to be awarded by direct award. UKNNL may award a contract directly to a Supplier where this is justified by the requirement for continuity of service, demonstrable value for money, and compliance with applicable procurement legislation. A direct award can be made to a supplier for the continuation of existing services. This approach is considered appropriate where the supplier has established knowledge, experience, systems integration, and operational capability that are critical to the effective delivery of the services and where a change of supplier would result in disproportionate cost, disruption, delay, or operational risk. Further justifications for Direct Award can be found below: • It secures the uninterrupted continuation of critical services. • The requirement consists of substantially similar or repeat services already being delivered by the current supplier. • A change of supplier would require significant transition activity, resulting in additional cost, resource burden, loss of operational knowledge, and increased delivery risk. • The supplier is already integrated within existing governance, processes, systems, and delivery arrangements. • The proposed award represents value for money when considering both contract costs and the costs and risks associated with supplier transition. • The award supports efficient service delivery and maximises public benefit. UKNNL has assessed that awarding the contract to the current supplier represents the most advantageous commercial outcome and is consistent with the Framework terms and/ or the principles set out within Schedule 5 of the Procurement Act 2023 relating to circumstances where supplier continuity, technical knowledge, interoperability, or the procurement of similar services provide a lawful justification for direct award. The Procurement Lead shall ensure that the rationale for direct award is fully documented and demonstrates that: • The direct award is objectively justified. • The decision delivers value for money and public benefit. • The risks and costs associated with changing supplier have been considered. • The award complies with the Framework Agreement, the Procurement Act 2023, and all applicable governance requirements. • Appropriate transparency and approval requirements have been satisfied prior to contract award. If there is a pre-existing relationship with any or other suppliers on the Framework which is in the public interest as it offers value for money or a saving in terms of resource and any other compelling commercially and/or value led reason that can be determined to make a Direct Award. Additional Direct Award Options - Lot 5 Only a) Direct award to the highest ranked supplier Admission to the Framework is based on a 50% technical evaluation and 50% commercial evaluation, with Framework Suppliers ranked in descending order according to their combined score. For a direct award under the ranking option, the Procurement Lead will approach the highest ranked Framework Supplier on Lot 5 and request a full quotation and indicative delivery programme for the requirement. Social value may be required for contracts delivered under Lot 5, where this is required, suppliers will be required to provide social value commitments within their proposal. The Procurement Lead may not negotiate the scope of the requirement in a manner that would materially alter the nature of the direct award. Where the highest ranked Framework Supplier is unable to meet the requirement, is unable to deliver within the required timescale, or does not provide a commercially acceptable quotation, the Procurement Lead may progress to the next highest ranked Framework Supplier on Lot 5. UKNNL is expected to award to the highest ranked Framework Supplier capable of meeting the requirement. However, where there is a demonstrable value-for-money benefit, a pre-existing project relationship, programme continuity requirement, or another compelling commercial justification, the Authority may award to an alternative Framework Supplier, as detailed in 3.4. In such circumstances, the Procurement Lead must ensure that the rationale for the award is appropriately documented and demonstrates the achievement of value for money and public benefit. b) Direct award using the desktop calculator This direct award mechanism enables the Procurement Lead to undertake a weighted evaluation of technical quality and pricing. The desktop calculator will determine the Most Advantageous Tender by applying a new tender specific weighting to each of the Framework Suppliers’ technical and commercial scores achieved during framework establishment. The supplier with the highest combined technical and commercial score post weighting will be invited to provide a proposal. The desktop calculator must be used to calculate the final ranking. The new revised costing will not be a factor of the evaluation used to determine the highest ranked supplier. The Procurement Lead may determine the relative weighting of Technical and Price, provided that the combined weighting totals 100% and remains within the permitted ranges set out below. Social value may be required for contracts delivered under Lot 5, where this is required, suppliers will be required to provide social value commitments within their proposal. Following completion of the desktop evaluation, the requirement should be awarded to the highest ranked Framework Supplier. If that supplier is unable to meet the requirement, deliver within the required timescales, or satisfy any mandatory project requirements, the Procurement Lead may progress to the next highest ranked supplier until a suitable supplier is identified. The business area shall advise on the appropriate balance between Technical and Price having regard to the nature, complexity, and risk associated with the requirement. The values applied must fall within the ranges shown below. The weighting between Price and Technical will be dependent upon the specifics of each call-off but must be within the range set out below. Evaluation Criteria Range Pricing 5-95% Technical 5-95%.

Should I bid?

Tick what applies to you. Nothing is saved.

How to bid

  1. Read the full notice on Find a Tender, including any tender documents it links to.
  2. 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.
  3. Follow the submission instructions in the notice; it does not name an e-tendering portal.
  4. Send clarification questions before 1pm, Wednesday 2 December 2026.
  5. Make sure your bid arrives before 1pm, Tuesday 8 December 2026. Late bids are usually rejected.

Lots

LotTradeValue
Non-Nuclear Rig Fabrication and Machining
8 March 2027 to 7 March 2031
What this lot covers

This Lot is for Non-Nuclear Rig Fabrication and Machining. See Invitation to Tender for further information on Lot 1 and Procurement Specification Appendix A.

Construction, Building maintenance and repairs, Heating, plumbing and ventilation, Architecture and engineering£15,000,000
Nuclear Rig Fabrication
8 March 2027 to 7 March 2031
What this lot covers

This Lot is for Nuclear Rig Fabrication .See Invitation to Tender for further information on Lot 2 and Procurement Specification Appendix A.

Construction, Building maintenance and repairs, Heating, plumbing and ventilation, Architecture and engineering£15,000,000
Infrastructure Fabrication and Machining & Engineering Systems
8 March 2027 to 7 March 2031
What this lot covers

This Lot is for Infrastructure Fabrication and Machining & Engineering Systems. See Invitation to Tender for further information on Lot 3 and Procurement Specification Appendix A.

Construction, Building maintenance and repairs, Heating, plumbing and ventilation, Architecture and engineering£15,000,000
Associated Supplies, Products, Services & Technical Support
8 March 2027 to 7 March 2031
What this lot covers

This Lot is for Associated Supplies, Products, Services & Technical Support. See Invitation to Tender for further information on Lot 4 and Procurement Specification Appendix A.

Construction, Building maintenance and repairs, Heating, plumbing and ventilation, Architecture and engineering£15,000,000
Complex and/or High Value Rig Fabrication & Machining
8 March 2027 to 7 March 2031
What this lot covers

This Lot is for Complex and/or High Value Rig Fabrication & Machining. See Invitation to Tender for further information on Lot 5 and Procurement Specification Appendix A.

Construction, Building maintenance and repairs, Heating, plumbing and ventilation, Architecture and engineering£15,000,000

Timeline

  1. Tender notice · UK4, notice 106629-2026

About the buyer

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From notice 106629-2026 on Find a Tender, first published 10 November 2026. We last checked for changes on 10 November 2026.