City of London heat network zone
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Summary
Where City of London has got to
The City of London is not on the original pilot list, but the Corporation says it is one of the authorities supported through the Advanced Zoning Programme. It tendered in December 2025 for a development partner for a low-carbon network across the Square Mile, and consulted on a zone covering the whole City between June and August 2026. It expected to name a partner in November 2026.
Status
Stage history
- 2Zone development area
The City of London Corporation, which says it is one of the authorities in the Advanced Zoning Programme, published a tender for a heat network development partner for the Square Mile.
Source: Procurement of the development agreement related to a low carbon heat network in the Square Mile: tender notice - 3Consultation open
The Corporation consulted on a proposed zone covering the whole Square Mile until 12 August 2026. The consultation is preparatory, because the zoning regulations are not yet in force.
Source: Zone boundary consultation: frequently asked questions (City of London Corporation)
Geography
Zone boundaries and candidate areas
The whole Square Mile is the proposed zone. The current competition covers the centre and west of the City; the north-east may form a later competition area.
Source: Low carbon heat networks (updated 5 October 2026)Candidate areas come from government-commissioned studies and council work. They are not legal boundaries. A zone’s boundary is fixed only when it is designated under the zoning regulations.
Delivery
Developers and partners
| Organisation | Role | Date |
|---|---|---|
| Heat network development partner for the Square MileThe Corporation expected to appoint a partner in November 2026. No award had been published at our last check.Source: Procurement of the development agreement related to a low carbon heat network in the Square Mile: tender notice | Procurement under way | 16 Dec 2025 |
No statutory zone developer can be appointed until a zone is designated. Partners appointed by councils before then are listed as development or delivery partners.
Today
Existing heat networks
Citigen · E.ON
Source: Low carbon heat networks (updated 5 October 2026)
Paper trail
Council and government documents
| Date | Document |
|---|---|
| Low carbon heat networks (updated 5 October 2026)City of London Corporation | |
| Zone boundary consultation: frequently asked questionsCity of London Corporation | |
| Procurement of the development agreement related to a low carbon heat network in the Square Mile: tender noticeCity of London Corporation (Find a Tender) |
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Sources
Sources for this page
- Procurement of the development agreement related to a low carbon heat network in the Square Mile: tender notice — City of London Corporation (Find a Tender), 16 December 2025
- Low carbon heat networks (updated 5 October 2026) — City of London Corporation, 5 October 2026
- Zone boundary consultation: frequently asked questions — City of London Corporation, June 2026
Record last checked .