Westminster (South Westminster Area Network) heat network zone
Last change
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Summary
Where Westminster (South Westminster Area Network) has got to
The South Westminster Area Network is a planned large-scale network across central Westminster, developed with government support. A joint venture of Hemiko and Vital Energi was appointed as developer in autumn 2024, according to the firms involved. Government's October 2024 announcement mentions two London schemes without naming this one, so its place on this tracker relies on the London Assembly's research unit.
Status
Stage history
- 2Zone development area
Government named two London schemes among the first places to develop zones without naming the second; the London Assembly's research unit identifies it as the South Westminster Area Network.
Source: Heat networks in London (London Assembly Research Unit, Mar 2026)
Geography
Zone boundaries and candidate areas
From Victoria Station to Temple, between St James's Park and the Thames, using heat from the river, the Underground and sewers.
Source: Plans unveiled for UK's largest heat network (AECOM press release, Nov 2024)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 |
|---|---|---|
| SWAN Partnership (Hemiko and Vital Energi)Joint venture appointed as developer through a government-run procurement. Reported by the firms and their partners; we have not read a government notice of the award.Source: Plans unveiled for UK's largest heat network (AECOM press release, Nov 2024) | Development or delivery partner (outside the statutory process) | Nov 2024 |
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
Pimlico District Heating Undertaking · Westminster City Council
Serves more than 3,000 homes and businesses. The council is reviewing plans to replace it.
Source: Council to review plans for replacing Pimlico District Heating Undertaking (Westminster City Council, Jun 2026)
Paper trail
Council and government documents
| Date | Document |
|---|---|
| Council to review plans for replacing Pimlico District Heating UndertakingWestminster City Council | |
| Heat networks in LondonLondon Assembly Research Unit | |
| Six towns and cities to pilot clean heating innovationDepartment for Energy Security and Net Zero |
Changelog
Changes logged for Westminster (South Westminster Area Network)
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Sources
Sources for this page
- Six towns and cities to pilot clean heating innovation — Department for Energy Security and Net Zero, 25 October 2024
- Heat networks in London — London Assembly Research Unit, 2 March 2026
- Council to review plans for replacing Pimlico District Heating Undertaking — Westminster City Council, 10 June 2026
Record last checked .