View official notice ↗Official source
The Butterfly House and Centre for Understanding the Environment (CUE) are located within the wider Horniman Gardens site, which is a Grade II listed Park and Garden. The CUE was constructed in 1995 and was originally intended as a temporary structure with an expected lifespan of 20 years. The Butterfly House was constructed in 2016 as glasshouse for tropical plants and butterflies. The Horniman wish to engage a Main Contractor who will manage and deliver the implementation of the decarbonisation of the above buildings in the listed setting. The works will be let on the basis of traditional JCT contract intermediate form without quantities, but with some contractor design elements. As part of the Horniman's Climate and Ecology Manifesto we have made a commitment to become Greenhouse Gas Neutral by 2040. The key objective of this project is to move us towards this goal by doing the following: • Butterfly House: Replacing the gas cabinet air heater with air-to-air Air Source Heat Pumps (ASHPs). • Butterfly House: Thermal performance and air tightness improvement by replacing existing glass and acrylic with triple layer polycarbonate cladding to existing steel structure with new aluminum glazing bars, window and vents. • Butterfly House: Thermal performance and carbon reduction by installation of new trench heating with new Air Handling Unit and visitor path surface or as an alternative an fan-coil system • CUE: Replacing the gas boiler in the Centre for Understanding the Environment (CUE) building with air-to-water Air Source Heat Pumps. • CUE: Improve the thermal performance and air tightness improvement by draught proofing and thermal bridge mitigation including floor, wall and roof new thermal insulation. • CUE: Install Mechanical Ventilation Heat Recovery (MVHR) • Upgrading the electrical cables inside both the Butterfly House and CUE building.
UKI, GB
No lot description published.
Award criteria
Price — For tender evaluation following initial Selection Questionnaire (SQ). (60%)
Quality — For tender evaluation following initial Selection Questionnaire (SQ). (40%)
| Item | Category | Quantity |
|---|---|---|
| 1 | Electricity distribution and control apparatus, Electrical equipment and apparatus, Construction work, Installation services of electrical and mechanical equipment | Not published |
Benchmarked against retained Find a Tender procedures with CPV division 31. The category anchor is Electricity distribution and control apparatus (31200000); this is a deliberately broad market comparator. The comparison is shown at several levels rather than pretending one company or region is always the best benchmark.
| Comparison set | Procedures | Reported bids per procedure | Named award suppliers | Price evidence |
|---|---|---|---|---|
| Market: CPV division 31 | 1,920 | 5 median · 55.8 average (602 of 1,920 with a bid count) | 5.7 average (717 of 1,920 with named award suppliers) | Not published |
| Same buyer | 0 | Not published | Not published | Not published |
| Delivery region: UKI | 158 | 6.5 median · 39 average (34 of 158 with a bid count) | 4.2 average (51 of 158 with named award suppliers) | Not published |
| Similar published value (0.5×–2×) | 112 | 7 median · 7 average (1 of 112 with a bid count) | 1 average (1 of 112 with named award suppliers) | Not published |
“Reported bids” is an official aggregate, sometimes reported per lot; it is the closest available competition measure. “Named award suppliers” are winners, not all applicants.
Not enough comparable procedures currently publish both a GBP tender value and a usable lowest-valid-bid value to calculate a responsible price-reduction benchmark. Tenderline deliberately does not infer a saving from named award suppliers or from missing award values.
No planning milestones published.
No linked framework, prior procurement or reprocurement published.
Diagnostic view. “Not published” means this current release does not provide a value.
| OCID | ocds-h6vhtk-066112 |
|---|---|
| Latest release ID | 029636-2026 |
| Latest release timestamp | Tue Mar 31 2026 12:14:09 GMT+0000 (Coordinated Universal Time) |
| Source | find-a-tender |
| Official notice URL | https://www.find-tender.service.gov.uk/Notice/029636-2026 |
| Tender status | active |
| Procurement method | selective |
| Procurement method details | Competitive flexible procedure |
| Main procurement category | works |
| Above threshold | Yes |
| Legal basis | 2023/54 |
| Tender period: start | Not published |
| Tender period: end | Not published |
| Expression of interest deadline | 2026-04-10T23:59:00+01:00 |
| Enquiry deadline | 2026-04-05T23:59:00+01:00 |
| Award period: start | Not published |
| Award period: end | 2026-08-14T23:59:59+01:00 |
| Submission method details | Selection Questionnaire submissions should be made to Henry Stenning at hstenning@horniman.ac.uk and to Simon Hart at s.hart@prsarchitects.com https://www.horniman.ac.uk/ |
| Submission languages | en |
| Electronic catalogue policy | Not published |
| Total tender value | £900,000 |
| Tender lots in source | 1 |
| Tender items in source | 1 |
| Tender documents in source | 11 |
| Awards in latest release | 0 |
| Contracts in latest release | 0 |
| Parties in latest release | 2 |
| Date | Event | Reference |
|---|---|---|
| 31 Mar 2026 | tenderUpdate | 029636-2026 |
| 19 Mar 2026 | tenderUpdate | 025347-2026 |
| 18 Mar 2026 | tenderUpdate | 024762-2026 |
| 18 Mar 2026 | tenderUpdate | 024609-2026 |
| 3 Mar 2026 | tender | 019024-2026 |
Unmodified official OCDS data retained by Tenderline for this procurement process.
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},
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},
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},
"aboveThreshold": true,
"submissionTerms": {
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"electronicSubmissionPolicy": "allowed"
},
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"roles": [
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],
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"country": "GB",
"locality": "London",
"postalCode": "SE23 3PQ",
"countryName": "United Kingdom",
"streetAddress": "100 London Road"
},
"details": {
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"classifications": [
{
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},
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},
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},
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"roles": [
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"country": "GB",
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"postalCode": "SE11 4AA",
"countryName": "United Kingdom",
"streetAddress": "Studio 4 33 Stannary Street"
},
"details": {
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},
"identifier": {
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},
"roleDetails": "Project architects and M&E designers",
"contactPoint": {
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},
"additionalIdentifiers": [
{
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"scheme": "GB-PPON"
}
]
}
],
"language": "en",
"planning": {
"noEngagementNoticeRationale": "PME was undertaken by design team to develop design specifications only in particular with specialist greenhouse contractors and Heat Pump suppliers."
},
"initiationType": "tender"
}{
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"tag": [
"tender"
],
"date": "2026-03-03T14:35:38Z",
"ocid": "ocds-h6vhtk-066112",
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"value": {
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"currency": "GBP",
"amountGross": 1080000
},
"status": "active",
"secondStage": {
"maximumCandidates": 5,
"minimumCandidates": 1
},
"suitability": {
"sme": true,
"vcse": true
},
"awardCriteria": {
"criteria": [
{
"name": "Price",
"type": "price",
"numbers": [
{
"number": 60,
"weight": "percentageExact"
}
],
"description": "For tender evaluation following initial Selection Questionnaire (SQ)."
},
{
"name": "Quality",
"type": "quality",
"numbers": [
{
"number": 40,
"weight": "percentageExact"
}
],
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}
]
},
"contractPeriod": {
"endDate": "2028-03-31T23:59:59+01:00",
"startDate": "2026-09-04T00:00:00+01:00"
},
"selectionCriteria": {
"criteria": [
{
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"forReduction": true
}
]
}
}
],
"items": [
{
"id": "1",
"relatedLot": "1",
"deliveryAddresses": [
{
"region": "UKI",
"country": "GB",
"countryName": "United Kingdom"
}
],
"additionalClassifications": [
{
"id": "31200000",
"scheme": "CPV",
"description": "Electricity distribution and control apparatus"
},
{
"id": "31600000",
"scheme": "CPV",
"description": "Electrical equipment and apparatus"
},
{
"id": "45000000",
"scheme": "CPV",
"description": "Construction work"
},
{
"id": "51100000",
"scheme": "CPV",
"description": "Installation services of electrical and mechanical equipment"
}
]
}
],
"title": "CUE & Butterfly House Decarbonisation",
"value": {
"amount": 900000,
"currency": "GBP",
"amountGross": 1080000
},
"status": "active",
"documents": [
{
"id": "conflictOfInterest",
"description": "Not published",
"documentType": "conflictOfInterest"
},
{
"id": "A-12632",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12632",
"format": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"documentType": "biddingDocuments"
},
{
"id": "A-12633",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12633",
"format": "application/pdf",
"documentType": "biddingDocuments"
},
{
"id": "A-12634",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12634",
"format": "application/pdf",
"documentType": "biddingDocuments"
},
{
"id": "A-12635",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12635",
"format": "application/pdf",
"documentType": "biddingDocuments"
},
{
"id": "A-12636",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12636",
"format": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"documentType": "biddingDocuments"
},
{
"id": "A-12660",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12660",
"format": "application/pdf",
"documentType": "biddingDocuments"
},
{
"id": "A-12786",
"url": "https://www.find-tender.service.gov.uk/Notice/Attachment/A-12786",
"format": "application/pdf",
"documentType": "biddingDocuments"
},
{
"id": "future",
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},
{
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"format": "text/html",
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"description": "Tender notice on Find a Tender",
"documentType": "tenderNotice",
"datePublished": "2026-03-03T14:35:38Z"
}
],
"procedure": {
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},
"legalBasis": {
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"uri": "https://www.legislation.gov.uk/ukpga/2023/54/contents",
"scheme": "UKPGA"
},
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},
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"enquiryPeriod": {
"endDate": "2026-04-05T23:59:59+01:00"
},
"aboveThreshold": true,
"submissionTerms": {
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],
"electronicSubmissionPolicy": "allowed"
},
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"country": "GB",
"locality": "London",
"postalCode": "SE11 4AA",
"countryName": "United Kingdom",
"streetAddress": "Studio 4 33 Stannary Street"
},
"details": {
"url": "http://www.prsarchitects.com/"
},
"identifier": {
"id": "03189549",
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"roleDetails": "Project architects and M&E designers",
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