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Published 18 Feb 2026, 14:43 GMT

Official UK procurement notice

9004476 - Supply of B23 Mirror System for Diamond Light Source

Official notice

Authority: DIAMOND LIGHT SOURCE LIMITED (Central government)

GoodsOpen procedureAbove thresholdSME suitable
Sectors: Laboratory, optical and precision equipments (excl. glasses) (38) Delivery: South East (UKJ14)
Published estimate£500,000≈ £300k / year · £600,000 inc. VAT37.6% below published estimate
Submissions closed 23 Mar 2026awarded 29 Apr 2026
Awarded to Bestec GmbH
Contract term 1 yr 8 moends 16 Dec 2027 · starts 16 Apr 2026

What is being bought

Published requirement description

Located on the Harwell Science & Innovation Campus in Oxfordshire, Diamond Light Source (DLS) is a leading-edge facility for science, engineering and innovation. DLS allows researchers from academia and industry to investigate the structure and behaviour of the world around us at the atomic and molecular level.

To continue delivering the world-changing science that Diamond enables, the facility is being upgraded to Diamond-II, a co-ordinated programme of development that combines a major machine upgrade with new instruments and complementary improvements to optics, detectors, sample environment and delivery capabilities, and computing, as well as integrated and correlative methods. This will be transformative in speed and spatial resolution and will offer users streamlined access to enhanced instruments for life and physical sciences.

Beamline B23 is a UV-visible beamline that will utilize a lattice dipole-quadrupole (DQ) magnet as a source in the Diamond-II synchrotron. The beamline operates two modules (A and B) which provide ultraviolet and visible light for synchrotron radiation circular dichroism (SRCD) experiments. The operational energy range of the beamline is 125 to 800 nm (1.55 to 10 eV).

The scope of the contract is to design, manufacture and deliver a double, horizontally and vertically deflecting mirror system to the performance specification document using a shared concept.

The mirror system will support two mirror optics (not part of this tender) that will have a motorised 3-point kinematic motion system. Mirror System will have an Ultra High Vacuum (UHV) vacuum vessel, support structure and adjustments for alignment.

CPV: Mirrors

The lotProcurement structure

single lot · value published
Lot #1Awarded 1 yr 8 moSMEPublished value£500,000
Contract period: 16 Apr 2026 – 16 Dec 2027 (1 yr 8 mo)Value: £500,000 exc. VAT · £600,000 inc. VAT
Delivery: South EastEligibility: SME eligible
38622000 Mirrors

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
Quality: 55%Price: 45%
Published sub-criteria (5)
  • Technical Quality: 25%
  • Experience and Capacity: 25%
  • Delivery: 5%
  • Commercial: 5%
  • Price: 40%
Published award criteria (5)
  • Technical Quality
  • Experience and Capacity
  • Commercial
  • Delivery
  • Price
What this means for your bid
  • Price carries 45 of 100 points: a 10% discount moves about 4.5 points. Quality carries 55 of 100: the paper moves it further than the discount.

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

Procedure terms & legal framework

From the official record
Procedure method
Open procedure
Legal basis
UKPGA · 2023/54 Procurement Act 2023
Procurement category
Goods
Notice status
Awarded
Procurement threshold
Above threshold (FTS publication)
Regulatory regime
Standard
Commercial structure
Stand-alone contract (no framework)
Competition type
Competitive procedure
GPA / WTO covered
Yes (GPA)
Recurring procurement
Unspecified in notice
First published
18 Feb 2026, 14:43 GMT
Last source update
26 May 2026, 11:12 BST
Award evaluation window
Submission end – 2 Apr 2026
Authority reference
9004476
FTS notice number
2026/S 000-014842
Latest notice
Contract details notice (UK7)
Classification (CPV)
Mirrors
Delivery area
South East (UKJ14)
Official registry OCID
ocds-h6vhtk-065734 Find a Tender

How it was run

Official notice
Run through: portal not identified
Electronic submission allowedLanguage: EN
Submission deadline
23 Mar 2026, 12:00 GMT
Submission channel
Official e-sourcing portal
Electronic submission
Allowed
Accepted languages
en
Detailed submission instructions & authority contactsFrom official release

Please email tender submission to:

diamond.ac.uk ↗

and send a hard copy to:

Diamond Procurement

Diamond House

Diamond Light Source Ltd

Harwell Science and Innovation Campus

Didcot

Oxon

OX11 0DE

United Kingdom

Timeline

18 Feb 2026 → 26 May 2026 · 7 dates
  1. Tender notice published245 days ago
    18 Feb 2026, 14:43 GMT
  2. Submission deadline212 days ago
    23 Mar 2026, 12:00 GMT
  3. Award decision expected by202 days ago
    2 Apr 2026, 23:59 BST
  4. Contract starts189 days ago
    16 Apr 2026, 00:00 BST
  5. Assessment summaries sent176 days ago
    29 Apr 2026, 00:00 BST
  6. Standstill ends163 days ago
    11 May 2026, 23:59 BST
  7. Latest notice published148 days ago
    26 May 2026, 11:12 BST

Notice history

5 events · 3 releases on Find a Tender · since 18 Feb 2026
  1. Tender notice published
    18 Feb 2026, 14:43 GMT
    UK4
  2. Contract award notice published
    29 Apr 2026, 13:26 BST
    UK6
  3. Status changed to complete
    29 Apr 2026, 13:26 BST
  4. Contract signature expected
    12 May 2026, 23:59 BST
    scheduled
  5. Contract details notice published
    26 May 2026, 11:12 BST
    UK7

Commercial outcome & contract awards

Published awards, contracts and bid statistics, not a forecast
Awards 1
Awarded value £312,2701 award exc. VAT
Bids received 44 from SMEs
Contracts signed 1latest 12 May 2026
Awarded toValueDateStatus
Bestec GmbHSME9004476 - Diamond Light Source B23 Mirror System12 May 2026 – 11 Jan 2028£312,27029 Apr 2026Awarded

Contracts

  • 9004476 - Supply of B23 Mirror System for Diamond Light Source · Bestec GmbHSME

    Signed
    12 May 2026
    Value
    £312,270
    Period
    12 May 2026 – 11 Jan 2028
    Status
    active

    No agreed KPIs: Contract value is below £5 million.

Bid statistics published by the authority

BidsSMEVCSEValid bid range
4final-stage tenders40—

Contracting authority & participating public bodies

DIAMOND LIGHT SOURCE LIMITED

Contracting authorityPublic authority - central government GB-COH: 04375679 · GB-PPON: PNGG-3778-PWBM Diamond House, Didcot, South East, OX11 0DEContact email

Bidders & participating suppliers

1 commercial party on the notice
  • Bestec GmbHAwarded supplierGB-PPON: PBYP-3972-XTPM Am Studio 2b, Berlin, DE, 12489, DEContact email

Official documents & specifications (4)

Official links; attachments are not copied

Tender pack and attachments

  • Technical specifications tenderTechnical specificationsVisit our web page: https://tenders.diamond.ac.uk Here suppliers are required to complete a one-off simple registration form. You are then able to login to register an interest against the tender and download the Tender Documents.

Notices published for this procedure

  • Contract details notice contractContract details noticeUK7Contract details notice on Find a Tender
  • Contract award notice awardContract award noticeUK6Contract award notice on Find a Tender
  • Tender notice tenderTender noticeUK4Tender notice on Find a Tender