1001 Smart Cities
🇬🇧 Bristol

Bristol Heat Network — District Heating the Council Built and Sold

🤖 AI-generated summary of the sources below · 🔎 Last verified · ◆ 21 sourced claims, none individually verified yet

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Bristol City Council built district heating in Redcliffe, Old Market, Bedminster and Temple, completing the original Redcliffe network in 2016, and placed the assets in a company incorporated in October 2018 as Energy Service Bristol Limited. Its energy centres include a 3MW water source heat pump at Castle Park that draws heat from Bristol's Floating Harbour. Renamed Bristol Heat Networks Limited, the company passed to Vattenfall Heat UK on 4 January 2023 under the Bristol City Leap partnership; the reported buyer for the next sale is the London private equity firm Reinova Capital, and the council consented to the change of ownership on 30 July 2026.

Live 📅 since 2016
Outcome🔄 Ongoing
Evidence📰 Media
what does this mean?The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →
Run byBristol Heat Networks Limited (Vattenfall Heat UK); built and owned by Bristol City Council until January 2023
Scale🏘️ District
Cost≈£53.3m of council capital at the point of transfer
FundingBristol City Council borrowing and connection fees plus UK government grants (Heat Network Investment Project, Green Heat Network Fund); expansion capital from Vattenfall under Bristol City Leap

📊 Impact

The network serves almost 6,000 customers across 35 buildings, and heat is metered at each building's substation rather than inside the flat: the building is the customer, the households behind the meter are not, and none of them can switch supplier. The operator's own published figures for its size disagree — Bristol City Leap puts the network at the equivalent of over 13,000 homes, while a March 2026 policy paper from the University of Bath's Brunel Centre puts it at 6,500. Reporting on the company's filed accounts puts 2024 heat sales at £3.1m against production costs of £4.3m, and losses since 2023 at £12.3m.

🎓 Lesson

A heat network is a monopoly by construction: one pipe, one supplier, and a connection meant to outlast whoever owns it. Bristol's passed out of council ownership in January 2023 and is changing hands again, while the households it heats cannot switch. Vattenfall is not registered with Heat Trust in Bristol and gives the reason that registration requires direct customers, which it does not have here. A statutory regulator arrived only on 27 January 2026, when Ofgem's first consumer protection rules for heat networks took effect.

⚡ EnergyHeat & coolingSmart grid & energySensors & IoT

Sources

↗ Companies House — BRISTOL HEAT NETWORKS LIMITED (11652156)Statutory register. Incorporated 31 October 2018 under the previous name ENERGY SERVICE BRISTOL LIMITED, held until 18 Aug 2020; status Active; SIC 35300 "Steam and air conditioning supply"; registered office now 5th Floor 70 St. Mary Axe, London EC3A 8BE — Vattenfall's UK address, not a Bristol one. Last accounts made up to 31 December 2024.
↗ Companies House — persons with significant control, Bristol Heat Networks LimitedThe ownership chain in the primary register: Bristol City Council notified 31 October 2018, ceased 17 August 2020; Bristol Holding Limited notified 17 August 2020, ceased 4 January 2023; Vattenfall Heat Uk Limited notified 4 January 2023 with "Ownership of shares – 75% or more", "Ownership of voting rights - 75% or more" and "Right to appoint or remove directors". Still the active entry when read, so the onward sale is not shown as completed.
↗ Triple Point Heat Networks — Bristol Redcliffe Network (HNIP delivery body)Published 27 May 2020Delivery body for the UK government's Heat Network Investment Project. States "The original network was completed in 2016" and that Bristol City Council was awarded £3.6m to extend it and build an additional energy centre. Funder documentation of its own grant, so not an independent evaluation.
↗ Bristol City Leap — Heat Networks (partnership site)Names the four areas served and nine planned network areas; states "The Bristol heat network currently supplies the equivalent of over 13,000 homes with heating and hot water"; explains that "To formally register a heat network with Heat Trust requires direct customers, which Vattenfall doesn't currently have in Bristol." Its regulation line — Ofgem "is set to formally start in 2025" — was already out of date when read; the rules started on 27 January 2026.
↗ Vattenfall Heat UK — Bristol heat network connection FAQ (operator)Sets the metering boundary: supply runs to the building boundary as a bulk supply connection, the heat exchange "marks the point of ownership for bulk supply connections", and the variable part of the charge is "metered at the building's substation". Heat Interface Units are described for direct customers, which the operator says it does not have in Bristol.
Show 7 more sourcesShow fewer
↗ Vattenfall Heat UK — Bristol (operator)Describes the "twenty-year partnership between Bristol City Council, Ameresco and Vattenfall", a pledge to "invest £475 million by 2030 to expand the heat network and provide heating and hot water to the equivalent of 12,000 homes", and the Castle Park heat pump serving 2,500 homes. A second operator page states 11,500 homes-equivalent "committed" — a pipeline figure, not a connection count.
↗ Vital Energi — Castle Park Water Source Heat Pump Project (contractor)Builder's own case study: a "3MW water source heat pump" drawing from the floating harbour, lifting temperature to 70–80°C, with a thermal store and backup gas boilers, quoted at "a COP of 3.18" and delivering about 80% of the energy centre's heat. Contractor material, so media grade at best. It says the pump "contributes to heating 1,000 homes and businesses", against Bristol City Leap's 2,500 — an unreconciled conflict.
↗ City AM — Vattenfall's UK energy assets poised to be snapped up by private equity firmPublished 20 May 2026Reports Vattenfall selling "three of its heat network businesses to London-based Reinova Capital" — Bristol Heat Networks, Midlothian Energy and Vattenfall Brent Cross — at a price "estimated at hundreds of millions". Vattenfall itself would say only that it "began an ownership assessment of its UK district heating business in March 2025, and that assessment is ongoing", so the buyer is reported rather than confirmed by the seller.
↗ Joanna Booth — local reporting on the council's decision papersPublished 31 July 2026Self-published local journalism working from Bristol City Council's decision papers and the company's filed accounts. Carries "The Bristol heat network serves almost 6,000 customers across 35 buildings in Redcliffe, Old Market, Bedminster and Temple"; "None of them can switch."; the council's £53.3m capital budget at transfer (£22.7m borrowed, £22.5m government grants, £8.2m connection fees); the 2024 accounts figures; the special share as "the council's right to approve a change of ownership"; a new £31m cap on what the council can recover under Ameresco's parent company guarantee; and a going-concern warning from the company's auditors. Single-sourced for the financial figures.
↗ BBC News — Bristol heat networks sale price 'undervalued' says councillorReports the council valuing the networks at £20m on book value ahead of the transfer to Vattenfall, with the opposition finance spokesman Cllr Geoff Gollop arguing that book value is "not a normal accounting metric" and that "The published figure almost certainly represents an undervaluation". The page could not be read from here — the BBC blocks automated fetching on both bbc.co.uk and bbc.com — so its content was established through search results only and no date is recorded.
↗ The Brunel Centre, University of Bath — Bringing decarbonisation home: Bristol's heat networkPublished 19 March 2026Policy insight by Finlay Perry drawing on an interview with Vattenfall's business development director. States the network "currently supplies the equivalent of 6,500 homes, with goals to reach 12,000 by 2030" — roughly half the figure the operator's own partnership site gives. Also gives the electricity-to-gas price ratio as 1:4.7 as of January 2026, the structural obstacle to electrifying heat.
↗ Ofgem — Countdown to the launch of new regulatory rules for heat networksPublished 6 January 2026The regulator's own notice: "On 27 January 2026, new consumer protection rules will be formally launched to allow Ofgem to begin regulating heat networks in Great Britain." Before that date heat network customers in Great Britain had no statutory energy regulator.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 2016. 5 of 12 sources carry a publication date, from 27 May 2020 to 31 July 2026.

When the sources were published

  1. Triple Point Heat Networks — Bristol Redcliffe Network (HNIP delivery body)
  2. Ofgem — Countdown to the launch of new regulatory rules for heat networks
  3. The Brunel Centre, University of Bath — Bringing decarbonisation home: Bristol's heat network
  4. City AM — Vattenfall's UK energy assets poised to be snapped up by private equity firm
  5. Joanna Booth — local reporting on the council's decision papers

Every source, with links ↑

What happened to this record

  1. Entered the record
  2. Sources last read

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 21 claims with their sources · the forensic record

Evidence Passport · public beta 21 addressable claims, 12 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 21

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-71b1af9fe992cc29 descriptive
Bristol City Council built district heating in Redcliffe, Old Market, Bedminster and Temple
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Bristol City Leap names the areas: 'Vattenfall has nine heat network areas planned for Bristol and is currently serving customers in Redcliffe, Old Market, Bedminster and Temple.' Triple Point, the delivery body for the government's Heat Network Investment Project, names Bristol City Council as the funding beneficiary that built and extended the Redcliffe network.
Caveat
The four areas are separate networks rather than one connected system; a 2026 Green Heat Network Fund award is intended to join Temple, Old Market and Redcliffe together.

Sources carrying this claim

  1. Bristol City Leap — Heat Networks (partnership site)
  2. Triple Point Heat Networks — Bristol Redcliffe Network (HNIP delivery body)
Claim 2 clm-ccffe7d34f36e3b2 quantitative
completing the original Redcliffe network in 2016
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'The original network was completed in 2016', on the HNIP delivery body's page describing the later £3.6m extension award to Bristol City Council.
Caveat
This is the completion of the first network, not the date the council's wider heat network programme began; a contractor's site puts a first phase of 700 social housing properties on biomass boilers at the same date, which I did not corroborate independently.

Sources carrying this claim

  1. Triple Point Heat Networks — Bristol Redcliffe Network (HNIP delivery body)
Claim 3 clm-23a64cdd9ee49ce9 quantitative
placed the assets in a company incorporated in October 2018 as Energy Service Bristol Limited
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The statutory register gives incorporation as 31 October 2018 and the previous name 'ENERGY SERVICE BRISTOL LIMITED' held from 31 Oct 2018 to 18 Aug 2020, with SIC code 35300 'Steam and air conditioning supply'.
Caveat
The register records the company's formation and renaming; it does not itself record the date on which the physical heat assets were transferred into it.

Sources carrying this claim

  1. Companies House — BRISTOL HEAT NETWORKS LIMITED (11652156)
Claim 4 clm-740e6873c0833434 quantitative
Its energy centres include a 3MW water source heat pump at Castle Park that draws heat from Bristol's Floating Harbour
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The builder's case study describes a '3MW water source heat pump' taking water from the nearby floating harbour and lifting it to 70–80°C for the Bristol heat network; Bristol City Leap describes the same plant at Castle Park Energy Centre generating 3MW of low carbon heat.
Caveat
The two sources disagree on how much it heats — the contractor says it 'contributes to heating 1,000 homes and businesses', Bristol City Leap says it provides heat to 2,500 homes — so no homes figure is stated here.

Sources carrying this claim

  1. Vital Energi — Castle Park Water Source Heat Pump Project (contractor)
  2. Bristol City Leap — Heat Networks (partnership site)
Claim 5 clm-7becb12caef83b2c quantitative
the company passed to Vattenfall Heat UK on 4 January 2023
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The persons-with-significant-control record shows Vattenfall Heat Uk Limited notified on 4 January 2023 with 'Ownership of shares – 75% or more', 'Ownership of voting rights - 75% or more' and the 'Right to appoint or remove directors', and Bristol Holding Limited ceasing on the same day.
Caveat
The register records the date control was notified, which is the date the beneficial ownership changed; the wider Bristol City Leap partnership was announced earlier.

Sources carrying this claim

  1. Companies House — persons with significant control, Bristol Heat Networks Limited
Claim 6 clm-5a0269c66bd3f82c descriptive
under the Bristol City Leap partnership
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator describes a 'twenty-year partnership between Bristol City Council, Ameresco and Vattenfall' that 'will enable the delivery of at least £1 billion of investment into Bristol's energy system', with the heat network as Vattenfall's part of it.
Caveat
Bristol City Leap is a separate and much broader programme; only the heat network's ownership passing to Vattenfall is claimed here.

Sources carrying this claim

  1. Vattenfall Heat UK — Bristol (operator)
Claim 7 clm-64b087de7a9a7650 descriptive
the reported buyer for the next sale is the London private equity firm Reinova Capital
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
City AM reports Vattenfall selling 'three of its heat network businesses to London-based Reinova Capital', naming Bristol Heat Networks among them. The word 'reported' is doing real work: Vattenfall itself would confirm only that its ownership assessment, begun in March 2025, 'is ongoing'.
Caveat
Not confirmed by the seller, and the register still showed Vattenfall Heat UK in control when checked. Sources also disagree on when Reinova Capital was founded — City AM says 2024, the local reporting says 2025 — so no founding year is stated.

Sources carrying this claim

  1. City AM — Vattenfall's UK energy assets poised to be snapped up by private equity firm
Claim 8 clm-e09c00417a1f3eab quantitative
the council consented to the change of ownership on 30 July 2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The report states that Bristol City Council approved the sale on 30 July 2026, linking to the decision, and gives the call-in window verbatim: 'The decision can be called in until Thursday 6 August.' The council's power to consent is its special share, described as 'the council's right to approve a change of ownership'.
Caveat
Single-sourced to self-published local journalism; the council's own decision paper could not be reached. The find string is the call-in sentence because the sentence carrying the approval date is not reproduced verbatim in a form I could copy.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 9 clm-062e79f46b894dbe quantitative
The network serves almost 6,000 customers across 35 buildings
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'The Bristol heat network serves almost 6,000 customers across 35 buildings in Redcliffe, Old Market, Bedminster and Temple'.
Caveat
Single-sourced. Note the arithmetic tension the source itself carries: almost 6,000 customers in 35 buildings means the customers counted are dwellings and businesses inside the blocks, while the metered supply contract sits at the building.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 10 clm-4620a389250eab70 descriptive
heat is metered at each building's substation rather than inside the flat
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator's Bristol FAQ describes the variable part of the charge as 'metered at the building's substation', with the substation located in the basement or on the ground floor of the connected building.
Caveat
The operator's national customer pages describe a heat meter inside the home for direct customers; those apply where Vattenfall supplies households directly, which it says it does not do in Bristol.

Sources carrying this claim

  1. Vattenfall Heat UK — Bristol heat network connection FAQ (operator)
Claim 11 clm-af45ce590a291075 descriptive
the building is the customer, the households behind the meter are not
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The FAQ states that supply runs to the building boundary as a bulk supply connection and that the heat exchange 'marks the point of ownership for bulk supply connections'. Bristol City Leap states that Vattenfall does not currently have direct customers in Bristol, which is the same fact seen from the other end.
Caveat
A description of the contractual boundary, not of who ultimately pays; residents pay through their landlord or managing agent, and neither source states how that onward charge is set.

Sources carrying this claim

  1. Vattenfall Heat UK — Bristol heat network connection FAQ (operator)
  2. Bristol City Leap — Heat Networks (partnership site)
Claim 12 clm-bb8a1726ca510f20 descriptive
none of them can switch supplier
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'None of them can switch.' The report adds 'One pipe, one supplier, no alternative.' — a description of the physical monopoly rather than of a contractual restriction.
Caveat
Single-sourced, though it follows from the network's construction: there is no competing heat main to move to.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 13 clm-3d5d75013dc48edf quantitative
Bristol City Leap puts the network at the equivalent of over 13,000 homes
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'The Bristol heat network currently supplies the equivalent of over 13,000 homes with heating and hot water.'
Caveat
A homes-equivalent conversion of heat load, not a count of households. A separate operator page gives 11,500 homes-equivalent 'committed', which is a pipeline figure again different from both.

Sources carrying this claim

  1. Bristol City Leap — Heat Networks (partnership site)
Claim 14 clm-2cd81773b5241659 quantitative
a March 2026 policy paper from the University of Bath's Brunel Centre puts it at 6,500
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The policy insight, published 19 March 2026, states the network 'currently supplies the equivalent of 6,500 homes, with goals to reach 12,000 by 2030'.
Caveat
The paper draws on an interview with Vattenfall's own business development director, so this is not an independent measurement of the network — it is a second operator-derived figure that disagrees with the first.

Sources carrying this claim

  1. The Brunel Centre, University of Bath — Bringing decarbonisation home: Bristol's heat network
Claim 15 clm-6f959382e65daaa7 quantitative
puts 2024 heat sales at £3.1m
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'In 2024, it sold £3.1m of heat and spent £4.3m producing it.' The underlying accounts to 31 December 2024 are confirmed as filed on the Companies House register.
Caveat
One journalist's reading of the filed accounts; I confirmed the accounts exist on the register but did not open them, which is why the entry attributes the figure rather than asserting it.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 16 clm-14356fc183c0b51a quantitative
production costs of £4.3m
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Same sentence: 'In 2024, it sold £3.1m of heat and spent £4.3m producing it.'
Caveat
Same single source and same limitation as the revenue figure.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 17 clm-57a749b8b3a904ea quantitative
losses since 2023 at £12.3m
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'losses since 2023 total £12.3m', reported alongside a loss for 2024 of £6.7m after a £2.2m tax credit.
Caveat
Single-sourced. 2023 is also the year ownership changed, so the cumulative figure covers the network's life under Vattenfall rather than its whole life.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 18 clm-1e7dd443996e3919 quantitative
Bristol's passed out of council ownership in January 2023 and is changing hands again
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The register shows Bristol Holding Limited ceasing as controlling party and Vattenfall Heat Uk Limited being notified on 4 January 2023; City AM reports the onward sale of the same company to Reinova Capital.
Caveat
'Changing hands again' describes an agreed and council-consented transaction, not a completed one — the register still showed Vattenfall Heat UK in control when checked.

Sources carrying this claim

  1. Companies House — persons with significant control, Bristol Heat Networks Limited
  2. City AM — Vattenfall's UK energy assets poised to be snapped up by private equity firm
Claim 19 clm-bad4b9b0e645bd9e descriptive
the households it heats cannot switch
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'None of them can switch. One pipe, one supplier, no alternative.'
Caveat
Single-sourced, but a statement about physical connection rather than contract terms.

Sources carrying this claim

  1. Joanna Booth — local reporting on the council's decision papers
Claim 20 clm-f0fbd967daf31853 descriptive
Vattenfall is not registered with Heat Trust in Bristol and gives the reason that registration requires direct customers, which it does not have here
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'To formally register a heat network with Heat Trust requires direct customers, which Vattenfall doesn't currently have in Bristol.' The same page states that Vattenfall's service standards meet those of Heat Trust for bulk supply customers.
Caveat
Heat Trust is a voluntary consumer-protection scheme, so non-registration is not a breach of anything; the point is that the voluntary protection and the bulk-supply structure are linked.

Sources carrying this claim

  1. Bristol City Leap — Heat Networks (partnership site)
Claim 21 clm-49e3f2a4c8c481ad quantitative
A statutory regulator arrived only on 27 January 2026, when Ofgem's first consumer protection rules for heat networks took effect
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Ofgem's own notice states: 'On 27 January 2026, new consumer protection rules will be formally launched to allow Ofgem to begin regulating heat networks in Great Britain.'
Caveat
Regulation is phased: the January 2026 date is when the first authorisation conditions took effect, not when the full framework is in force. Bristol City Leap's own page still said the regime was 'set to formally start in 2025' when read.

Sources carrying this claim

  1. Ofgem — Countdown to the launch of new regulatory rules for heat networks
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-25-bristol-baseline effective 2026-08-25 · created 2026-08-25

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:950ee35088e978924fc34eb247f688bf637b0c5042c00143593e73809d3e6ca9
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
21
of 21 claims mapped
12
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Bristol Heat Networks Limited (Vattenfall Heat UK); built and owned by Bristol City Council until January 2023
Actor types
utility
Funding model
mixed
Funding description
Bristol City Council borrowing and connection fees plus UK government grants (Heat Network Investment Project, Green Heat Network Fund); expansion capital from Vattenfall under Bristol City Leap
Cost
≈£53.3m of council capital at the point of transfer
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

12 source dossiers

Companies House — BRISTOL HEAT NETWORKS LIMITED (11652156) find-and-update.company-information.service.gov.uk · 1 linked claim

Open original source ↗

Stable source ID
src-32334859c56d213d
Publisher
Name not classified · find-and-update.company-information.service.gov.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Statutory register. Incorporated 31 October 2018 under the previous name ENERGY SERVICE BRISTOL LIMITED, held until 18 Aug 2020; status Active; SIC 35300 "Steam and air conditioning supply"; registered office now 5th Floor 70 St. Mary Axe, London EC3A 8BE — Vattenfall's UK address, not a Bristol one. Last accounts made up to 31 December 2024.

Descriptive only — not page/paragraph exact
Claims linked
Companies House — persons with significant control, Bristol Heat Networks Limited find-and-update.company-information.service.gov.uk · 2 linked claims

Open original source ↗

Stable source ID
src-21346713e1d50464
Publisher
Name not classified · find-and-update.company-information.service.gov.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The ownership chain in the primary register: Bristol City Council notified 31 October 2018, ceased 17 August 2020; Bristol Holding Limited notified 17 August 2020, ceased 4 January 2023; Vattenfall Heat Uk Limited notified 4 January 2023 with "Ownership of shares – 75% or more", "Ownership of voting rights - 75% or more" and "Right to appoint or remove directors". Still the active entry when read, so the onward sale is not shown as completed.

Descriptive only — not page/paragraph exact
Claims linked
Triple Point Heat Networks — Bristol Redcliffe Network (HNIP delivery body) tp-heatnetworks.org · 2 linked claims

Open original source ↗

Stable source ID
src-0309a58a9fef45db
Publisher
Name not classified · tp-heatnetworks.org
Type / language
web-page · language not classified
Published
2020-05-27
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Delivery body for the UK government's Heat Network Investment Project. States "The original network was completed in 2016" and that Bristol City Council was awarded £3.6m to extend it and build an additional energy centre. Funder documentation of its own grant, so not an independent evaluation.

Descriptive only — not page/paragraph exact
Claims linked
Bristol City Leap — Heat Networks (partnership site) bristolcityleap.co.uk · 5 linked claims

Open original source ↗

Stable source ID
src-d9ab2616110bfcb8
Publisher
Name not classified · bristolcityleap.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Names the four areas served and nine planned network areas; states "The Bristol heat network currently supplies the equivalent of over 13,000 homes with heating and hot water"; explains that "To formally register a heat network with Heat Trust requires direct customers, which Vattenfall doesn't currently have in Bristol." Its regulation line — Ofgem "is set to formally start in 2025" — was already out of date when read; the rules started on 27 January 2026.

Descriptive only — not page/paragraph exact
Claims linked
Vattenfall Heat UK — Bristol heat network connection FAQ (operator) heat.vattenfall.co.uk · 2 linked claims

Open original source ↗

Stable source ID
src-17ef1a6cb720b05c
Publisher
Name not classified · heat.vattenfall.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Sets the metering boundary: supply runs to the building boundary as a bulk supply connection, the heat exchange "marks the point of ownership for bulk supply connections", and the variable part of the charge is "metered at the building's substation". Heat Interface Units are described for direct customers, which the operator says it does not have in Bristol.

Descriptive only — not page/paragraph exact
Claims linked
Vattenfall Heat UK — Bristol (operator) heat.vattenfall.co.uk · 1 linked claim

Open original source ↗

Stable source ID
src-4e226a46f9f355e4
Publisher
Name not classified · heat.vattenfall.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Describes the "twenty-year partnership between Bristol City Council, Ameresco and Vattenfall", a pledge to "invest £475 million by 2030 to expand the heat network and provide heating and hot water to the equivalent of 12,000 homes", and the Castle Park heat pump serving 2,500 homes. A second operator page states 11,500 homes-equivalent "committed" — a pipeline figure, not a connection count.

Descriptive only — not page/paragraph exact
Claims linked
Vital Energi — Castle Park Water Source Heat Pump Project (contractor) vitalenergi.co.uk · 1 linked claim

Open original source ↗

Stable source ID
src-52a7fb2f5c71fd3b
Publisher
Name not classified · vitalenergi.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Builder's own case study: a "3MW water source heat pump" drawing from the floating harbour, lifting temperature to 70–80°C, with a thermal store and backup gas boilers, quoted at "a COP of 3.18" and delivering about 80% of the energy centre's heat. Contractor material, so media grade at best. It says the pump "contributes to heating 1,000 homes and businesses", against Bristol City Leap's 2,500 — an unreconciled conflict.

Descriptive only — not page/paragraph exact
Claims linked
City AM — Vattenfall's UK energy assets poised to be snapped up by private equity firm cityam.com · 2 linked claims

Open original source ↗

Stable source ID
src-02c8c58150fb1434
Publisher
Name not classified · cityam.com
Type / language
web-page · language not classified
Published
2026-05-20
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Reports Vattenfall selling "three of its heat network businesses to London-based Reinova Capital" — Bristol Heat Networks, Midlothian Energy and Vattenfall Brent Cross — at a price "estimated at hundreds of millions". Vattenfall itself would say only that it "began an ownership assessment of its UK district heating business in March 2025, and that assessment is ongoing", so the buyer is reported rather than confirmed by the seller.

Descriptive only — not page/paragraph exact
Claims linked
Joanna Booth — local reporting on the council's decision papers joannab.substack.com · 7 linked claims

Open original source ↗

Stable source ID
src-d9acfdb0c1a7d220
Publisher
Name not classified · joannab.substack.com
Type / language
web-page · language not classified
Published
2026-07-31
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Self-published local journalism working from Bristol City Council's decision papers and the company's filed accounts. Carries "The Bristol heat network serves almost 6,000 customers across 35 buildings in Redcliffe, Old Market, Bedminster and Temple"; "None of them can switch."; the council's £53.3m capital budget at transfer (£22.7m borrowed, £22.5m government grants, £8.2m connection fees); the 2024 accounts figures; the special share as "the council's right to approve a change of ownership"; a new £31m cap on what the council can recover under Ameresco's parent company guarantee; and a going-concern warning from the company's auditors. Single-sourced for the financial figures.

Descriptive only — not page/paragraph exact
Claims linked
BBC News — Bristol heat networks sale price 'undervalued' says councillor bbc.co.uk · background

Open original source ↗

Stable source ID
src-2fffa448333b0d45
Publisher
Name not classified · bbc.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Reports the council valuing the networks at £20m on book value ahead of the transfer to Vattenfall, with the opposition finance spokesman Cllr Geoff Gollop arguing that book value is "not a normal accounting metric" and that "The published figure almost certainly represents an undervaluation". The page could not be read from here — the BBC blocks automated fetching on both bbc.co.uk and bbc.com — so its content was established through search results only and no date is recorded.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
The Brunel Centre, University of Bath — Bringing decarbonisation home: Bristol's heat network thebrunelcentre.co.uk · 1 linked claim

Open original source ↗

Stable source ID
src-1c37e567e93fe4c2
Publisher
Name not classified · thebrunelcentre.co.uk
Type / language
web-page · language not classified
Published
2026-03-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Policy insight by Finlay Perry drawing on an interview with Vattenfall's business development director. States the network "currently supplies the equivalent of 6,500 homes, with goals to reach 12,000 by 2030" — roughly half the figure the operator's own partnership site gives. Also gives the electricity-to-gas price ratio as 1:4.7 as of January 2026, the structural obstacle to electrifying heat.

Descriptive only — not page/paragraph exact
Claims linked
Ofgem — Countdown to the launch of new regulatory rules for heat networks ofgem.gov.uk · 1 linked claim

Open original source ↗

Stable source ID
src-6986394f5bef77aa
Publisher
Name not classified · ofgem.gov.uk
Type / language
web-page · language not classified
Published
2026-01-06
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-25
Dossier created
2026-08-25
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The regulator's own notice: "On 27 January 2026, new consumer protection rules will be formally launched to allow Ofgem to begin regulating heat networks in Great Britain." Before that date heat network customers in Great Britain had no statutory energy regulator.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇬🇧 Bristol Is Open — Programmable City Network Testbed · Bristol The other council company: one testbed left as a dormant shell, one revenue-earning asset sold on — two ends of municipal ownership. 🇫🇮 Salmisaari Seawater Heat Recovery Tunnel · Helsinki Both lift heat out of city water for a district network — Helsinki's stays with the municipal utility, Bristol's changed owner twice. 🇳🇴 Klemetsrud Waste-to-Energy Carbon Capture (CCS) · Oslo Two district-heating decarbonisation bets whose delivery hangs on who owns the plant when the capital call arrives.

Explore the wider context

📟 A Reading Is Not a Decision🌡️ Heat & cooling guide🏙️ Bristol city profile⚡ Energy projects📖 District heating📖 Prepaid metering📖 SCADA (supervisory control and data acquisition)
📎 Cite this project

1001 Smart Cities (2026). “Bristol Heat Network — District Heating the Council Built and Sold” — Bristol, United Kingdom. The Smart City Atlas. https://1001smartcities.org/projects/bristol-heat-network/ (last verified 2026-08-25). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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