Power plant · East Hertfordshire, England, United Kingdom
Buttermilk Farm
Buttermilk Farm is a power plant in East Hertfordshire, England, United Kingdom, with 1.1 MW of capacity, operated by Hallwick Energy.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | East Hertfordshire (coordinates), England | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Baldock Road, Buntingford, SG9 9RH | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Operating (operational) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Start year | 2012 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 12 Jan 2011 (permit 3/10/1598/FP, Town and Country Planning Act, issued by East Hertfordshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 3 Sept 2010 (reference 3/10/1598/FP, planning authority East Hertfordshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 12 Jan 2011 (granted, reference 3/10/1598/FP, planning authority East Hertfordshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Hallwick Energy | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 1.1 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Anaerobic Digestion | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 51.9473, -0.0455 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.
Request researchLatest events
Dated events about this power plant from official notices and registers, newest first. All recent changes.
- Commissioned
- Permit granted (planning authority East Hertfordshire, reference 3/10/1598/FP)
- Permit applied for (planning authority East Hertfordshire, reference 3/10/1598/FP)
How it compares
Buttermilk Farm is the 3,268th-largest of 3,430 power plants in England and the 4,829th-largest of 5,050 in the United Kingdom by capacity; its 1.1 MW is <0.1% of the 115,622 MW we hold for the United Kingdom. Ranks and totals cover the power plants in our data that report their capacity, not every one in existence. Power plants planned, permitted or under construction are ranked apart.
| Within | Rank | Total | Share |
|---|---|---|---|
| England | 3,268th of 3,430 | 71,965 MW | <0.1% |
| United Kingdom | 4,829th of 5,050 | 115,622 MW | <0.1% |
| All power plants in our data | 11,693rd of 12,032 | 1,190,447 MW | <0.1% |
Timeline
Dated facts about this power plant from its sources, oldest first.
- Started operating
Nearby
Within 50 km of this power plant: 60 data centers (1 operating, 88 MW), 12 substations, 2 grid connections, 1 AI supercomputer and 1 transmission line, measured from the coordinates in the facts above. The table shows the nearest 9, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Starwood House | Data center | — | — | 12 km |
| Hertfordshire Data Centre | Data center | — | — | 18 km |
| Colt London North Data Centre | Data center | — | — | 19 km |
| NVIDIA Cambridge-1 | AI supercomputer | 202 H100e | Operating | 23 km |
| North London (Electricity Line) Reinforcement | Transmission line | — | Permitted | 38 km |
| Cokes Lane Primary | Substation | — | — | 47 km |
| Tertiary Study grid connection | Grid connection | 57 MW | Planned | 48 km |
| Willesden GSP | Substation | — | — | 48 km |
| Acton Lane BSP | Substation | — | — | 48 km |
Operator and place
More from Hallwick Energy
Other power plants in England
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- Outer Dowsing Offshore Wind Farm1,500 MW
- Hornsea 2 - Optimus and Breesea1,320 MW
- Hornsea 1 - Heron & Njord1,218 MW
- Atlantic Array One - Bristol Channel Zone1,200 MW
- Five Estuaries - Wind Farm1,080 MW
- Rugeley Power Plant Conversion1,000 MW
- Teesworks Battery Storage Project1,000 MW
Data on this page
- Contains public sector information licensed under the Open Government Licence v3.0. DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Epoch AI. Epoch AI supercomputers, CC BY 4.0.
- JRC Open Power Plants Database (JRC-PPDB-OPEN), European Commission, Joint Research Centre. JRC Open Power Plants Database (JRC-PPDB-OPEN), CC BY 4.0.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- Dutch power station owners' and operators' pages. Dutch power station owners' and operators' pages, Facts only, each linked to its page.
- © OpenStreetMap contributors. OpenStreetMap data centers, ODbL 1.0.
- Contains public sector information licensed under the Open Government Licence v3.0. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.
- SSEN Distribution. SSEN Distribution data portal, CC BY 4.0.