Official UK procurement notice
Barbican Renewal Programme - Glass Systems and Envelope
Authority: The Mayor and Commonalty and Citizens of the City of London (Local council)
What is being bought
Published requirement descriptionGlass Systems and Envelope — Barbican Renewal Programme.
This is a bespoke glazed envelope design-and-build package, not new-build construction, on a part Grade II listed and Heritage sensitive building – The Barbican Arts Centre. The works comprise new glazed envelope and façade systems to the Conservatory and Stair 8, following directly behind the demolition (by others), which removes the existing glazing first. The package includes primary steel structure to the Conservatory and Terrace, and the façade access/maintenance walkway and associated gutters and louvres. The scope of works includes:
- Conservatory roof and vertical glazing: louvres, vents, perimeter benches, insulation, aluminum paneling, doors and associated gutters, including the Arid House.
- Steel structure relating to Conservatory glazing: primary steel structure supporting the Conservatory roof and vertical glazing systems, carried within this package's own Contractor Design Portion.
- Conservatory Lantern: re-glazed roof lantern.
- Conservatory Roof lights: Level 02 office roof lights and associated overhead glazing.
- Garden Room glazing, doors and associated gutters: refurbished steel framing to Lakeside Terrace with new acoustic double glazing/doorsets, overhead and Conservatory-facing glazing, and plant-room gutter louvre/infill system.
- Conservatory Terrace Glazing and Steel: new Level 04 enclosure — bespoke steel T-profile vertical glazing, matching overhead glazing, and the Terrace's primary steel structure and roof steelwork.
- Sculpture Court Roof lights: new roof lights, scope to be developed with the Architect and Façade Engineer.
- Stair 8 glazing and associated structure, louvres and gutters: crown/roof glazing on new external primary steel RHS mullions, planters glazing renewal, automated opening windows, exoskeleton mullion replacement (this package's own CDP), and crown mechanical louvres.
- Visual and performance mock-ups: façade and propagation bench, Conservatory Terrace and Fly tower infill glazing visual mock-ups, plus off-site performance mock-ups covering roof and façade weather-resistance to CWCT Sequence A methodology.
- Facade access and associated maintenance walkway: including the Conservatory Terrace mesh walkway and fascia panel.
- Two-stage procedure: up to 4 candidates will be invited to tender.
- How the procedure runs: Stage 1. Invitation to Participate (ITP) Stage 2 Invitation to tender ITT) Comprising of: - Structured workshops and site visits with shortlisted candidates. To communicate effectively the existing conditions, complex interfaces, Installation sequencing and methodology to ensure compliant pricing and invite innovate alternatives. - Technical submission - Commercial submission - Interview
CPV: Building installation work · Glasshouses · Structural steelworks
The lotProcurement structure
single lot · value publishedLot #1RenewalPublished value£10,600,000
- Economic & financial standing
As specified in the tender documents
- Technical & professional ability
Suppliers will be required to meet the conditions of participation set out in the tender documents. These include minimum requirements for financial capacity, insurance, modern slavery and data protection. In addition, suppliers will be required to respond to scored questions regarding experience. The highest scoring bidders who meet the conditions of participation will be invited to participate in the next tender stage in accordance with the methodology set out in the tender documents.
- Condition of participationshortlisting
The ITP will set out the information which bidders are required to provide to the City to enable it to draw up a list of up to a maximum of 4 pre-qualified applicants who will be able to proceed to the next stage of the procurement. In the event that a bidder or multiple bidders achieve the same moderated score as the 4th placed bidder, those bidders will also be invited to proceed to the next stage of the procurement.
What it takes to wini
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 morei
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).
Published sub-criteria (3)
- Technical: 45%
- Responsible procurement: 15%
- Commercial: 40%
Published award criteria (3)
- Commercial: Suppliers’ commercial responses will evaluated against total contract cost. The commercial evaluation methodology is set out in the tender documents.
- Technical: Suppliers will be required to submit responses to a number of sub-weighted questions relating to organisation, H&S, Risk Management, Programme / method statement, Quality and delivery, BSA/HRA, Supply chain, Trade contactors design. In addition, all shortlisted suppliers will be required to attend a scored interview.
- Responsible procurement: Suppliers will be required to submit responses to set out how they will deliver against climate action initiatives and social value.
- Economic & financial standing
As specified in the tender documents
- Technical & professional ability
Suppliers will be required to meet the conditions of participation set out in the tender documents. These include minimum requirements for financial capacity, insurance, modern slavery and data protection. In addition, suppliers will be required to respond to scored questions regarding experience. The highest scoring bidders who meet the conditions of participation will be invited to participate in the next tender stage in accordance with the methodology set out in the tender documents.
- Condition of participationshortlisting
The ITP will set out the information which bidders are required to provide to the City to enable it to draw up a list of up to a maximum of 4 pre-qualified applicants who will be able to proceed to the next stage of the procurement. In the event that a bidder or multiple bidders achieve the same moderated score as the 4th placed bidder, those bidders will also be invited to proceed to the next stage of the procurement.
- Price carries 40 of 100 points: a 10% discount moves about 4 points. The method statement decides this lot, not the discount.
- Turnover usually expected at this size: about £10,209,005 (twice the annual value).
Price arithmetic assumes straight proportional scoring; the tender pack may use another formula. Turnover is an indicative market norm (≈2× annual value), not a published condition.
Competition analysis · published record, not a forecast of who will bid
How The Mayor and Commonalty and Citizens of the City of London buys Engineering works and construction works (CPV 4522), and who usually turns up
The Mayor and Commonalty and Citizens of the City of London’s published record next to the market for the same work. Frameworks and DPS are left out: they draw different bid counts. Whole-market view: Engineering works and construction works (CPV 4522) →
How the contest usually goes
Winner shares use published awards; bid and price charts use contested lots.
i
How often small and medium firms win.
Share of awards where the winner’s size is known.
The counts under this question show how many awards have a known supplier size.
Small firms have won here. Neither number says whether you qualify; it describes who has been winning.
i
How often local firms win similar work.
Winners with a registered address in the delivery region, out of awards with a known address.
Local means the winner is registered in the region where that award was delivered. The market figure counts awards delivered in Greater London.
A local branch does not count if the registered address is elsewhere.
Most of this buyer’s recorded winners were registered outside the region where that award was delivered.
i
How long buyers here take to decide after bids close.
Middle value in days from the bid deadline to the award date, on competitions that published both.
Only decided tenders count, so slow ones still waiting are not in.
Half of these awards have an award date within 39 days of the bid deadline.
i
How often work is awarded with no recorded rival.
Direct awards and tenders where every published lot count shows one bid.
Both shares are minimums: some awards have no bid count.
Thin markets produce this too; it is not proof of a tailored specification.
Direct awards or one recorded bid are common here. Check the route before spending time on a bid.
How many bids did past lots attract?
i
How many bids past lots received.
Each colour is a bid-count range. Only competed lots with a published count are included.
Past bids do not predict this tender.
1 bid6% / 14%
2–324% / 29%
4–636% / 43%
7+34% / 14%
How did awards compare with estimates?
i
Where winning prices landed against estimates.
Each colour shows awards below, close to or above the published estimate, one lot at a time.
Past prices are a guide, not a bid price.
Below estimate65% / 83%
Within ±2%19% / 0%
Above estimate17% / 17%
Assess each lot i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
i
What past awards tell you about each lot.
See the forecast, this buyer’s earlier suppliers and firms with relevant wins.
No supplier is confirmed as a bidder.
Open a lot for its forecast, this buyer’s previous supplier and possible competitors, from published award history, not a bid list
Lot #1CPV 4522Published estimate£11m
i
How many bids this lot may attract.
The forecast uses similar past competitions. The bar shows either that forecast or past bid counts; the line below says which.
Each lot shows its own forecast based on its own category; forecasts for different lots of the same notice are not comparative.
A forecast, not a list of bidders.
1 bid14%
2–332%
4–646%
7+9%
i
Where the award price may land.
The forecast uses similar awards and the buyer’s estimate. The band covers the middle half of likely prices.
Based on 10 comparable awards. Each lot reflects its own category; forecasts for different lots of the same notice are not comparative.
A statistical guide from past awards, not a price to bid.
Middle 50%£9.5m–£11m
Estimate£11m
Who has supplied this buyer on similar work? i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
i
Who has done similar work for this buyer.
Past contracts are matched by buyer, title and type of work.
A past supplier may not bid again.
| Supplier | This buyer’s earlier contract | Lot | Award value | Why listed |
|---|---|---|---|---|
| Push the Button LtdWorked for this buyer | Replacement Works to Barbican Theatre House Lighting Systemnotice published Oct 2025 | — | — | Similar wording and category |
| Searcy Tansley and Company LimitedWorked for this buyer | Barbican Centre contribution towards re-design and refurbish of Level 1 restaurant kitchennotice published Apr 2025 | — | — | Similar wording and category |
Who could compete for this lot? i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
i
Who could compete for this lot?
Firms with relevant past wins. On a framework, we show firms on that agreement.
None is confirmed as a bidder.
| Supplier | Won in this category | Live contracts | Award vs estimate |
|---|---|---|---|
| £2.5m2 awards in 36m · last 9 months ago | None on file | no comparable pairs | |
| £421m11 awards in 36m · last 3 months ago | 4 live · £395m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 26% above n=5 | |
| £140m18 awards in 36m · last 2 months ago | 4 live · £32m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=11 | |
| £60m12 awards in 36m · last 2 months ago | 3 live · £7.3m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | at estimate n=10 | |
| £5.9m19 awards in 36m · last this month | 3 live · £4.0m iPublic contracts this supplier still holds. Its awards whose published end date is still in the future, with their values. Many contracts publish no end date, so this is a floor, not the whole book. Unexpired says nothing about spare capacity. | 8% below n=6 |
About this data
- Source. Official UK public procurement notices (Find a Tender), reused under the Open Government Licence v3.0. New notices arrive through the day; the figures are rebuilt nightly.
- Two views, kept apart. The authority’s own track record and the wider market for the same kind of work sit side by side and are never mixed. Where the local picture is too thin, a figure widens to a broader market and says which one it used.
- Forecasts are labelled. The price forecast and its range, possible competitors and the earlier-work matches are our estimates from past awards: not published facts, not win chances and not price advice. Official notices do not say who is bidding.
- Every figure shows what it rests on. Not every notice publishes a bid count, a value or a delivery region, so each figure carries the number of records behind it, and one built on few records is marked as such. The on a figure explains it; the counting rules are in the methodology. Spotted something wrong? Tell us.
Procedure terms & legal framework
From the official record- Procedure method
- Competitive flexible procedure
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Works
- Notice status
- Requests to participate open
- Procurement threshold
- Above threshold (FTS publication)
- Regulatory regime
- Standard
- Commercial structure
- Stand-alone contract (no framework)
- Competition type
- Competitive procedure
- GPA / WTO covered
- Unspecified in notice
- Recurring procurement
- Unspecified in notice
- First published
- 15 Sept 2026, 16:03 BST
- Last source update
- 2 Oct 2026, 11:10 BST
- Award evaluation window
- Submission end – 12 Feb 2027
- Authority reference
26/176/PS- FTS notice number
2026/S 000-093212- Latest notice
- Tender notice (UK4)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-06fa74Find a Tender
- How it runs
Stage 1. Invitation to Participate (ITP)
Stage 2 Invitation to tender ITT)
Comprising of:
- Structured workshops and site visits with shortlisted candidates. To communicate effectively the existing conditions, complex interfaces, Installation sequencing and methodology to ensure compliant pricing and invite innovate alternatives.
- Technical submission
- Commercial submission
- Interview
- Risks
The contract may require modification in the event of project overrun to ensure continuation of service and technical expertise is retained from the service provider (for example to provide additional works)
How to participate & submission route
Official notice Submit via Jaggaer- Requests to participate (first stage)
- 28 Oct 2026, 12:00 GMT
- Tender submission deadline
- 28 Oct 2026, 12:00 GMT
- Clarification deadline
- 16 Oct 2026, 12:00 BST
- Submission channel
- Official e-sourcing portal
- Electronic submission
- Allowed
- Accepted languages
- en
- Shortlist
- up to 4 candidates invited to tender
This tendering exercise is being undertaken using the electronic tendering system ‘City of London Corporation Sourcing & Contracts Portal’ (cityoflondon.ukp.app.jaggaer.com ↗). Suppliers will need to register an interest on the system in order to participate and registration is free.
Timeline
15 Sept 2026 → 1 Mar 2027 · 7 dates- Planning notice published42 days ago15 Sept 2026, 16:03 BST
- Tender notice published25 days ago2 Oct 2026, 11:10 BST
- Next notice expected24 days ago2 Oct 2026, 23:59 BST
- Clarification questions by11 days ago16 Oct 2026, 12:00 BST
- Today27 Oct 2026
- Submission deadlinein 19h28 Oct 2026, 12:00 GMT
- Award decision expected byin 108 days12 Feb 2027, 23:59 GMT
- Contract startsin 124 days1 Mar 2027
Notice history
3 events · 2 releases on Find a Tender · since 15 Sept 2026- Planned procurement notice published15 Sept 2026, 16:03 BSTUK3
- Tender notice published2 Oct 2026, 11:10 BSTUK4
- Status changed to active2 Oct 2026, 11:10 BST
Commercial outcome & contract awards
Nothing awarded yet- Awards (0)
- No award published
- Contracts (0)
- No contract published
- Bid statistics
- No aggregate bid statistics published
Contracting authority & participating public bodies
Official documents & specifications (2)
Official links; attachments are not copiedNotices published for this procedure
- Tender notice Tender notice on Find a Tender
- Planned procurement notice Planned procurement notice on Find a Tender