How it works
From the publishers’ files to your evidence
Grid Guardian reads each publisher’s own file on its own schedule, keeps what it reads, and shows every figure with its source beside it.
Read from
- NESOTEC Register, reform and tariffs
- The six DNOscapacity registers and headroom
- Elexongeneration and balancing
- DESNZplanning database
- Low Carbon Contracts CompanyCfD contracts
- Companies Housecompany records
Grid Guardian in figures
- Transmission projects
- 2,083project IDs in NESO’s TEC Register of 10 November 2026
- Distribution connections
- 2,732of 1 MW and over accepted to connect, in 6 DNOs’ registers
- Sources
- 63each cited with its publisher, date and licence
- Register history
- Since 2014NESO’s archived TEC Registers, month by month
As Grid Guardian showed them on 11 November 2026.
Project screening
Screen every project in the queue
Every project in NESO’s TEC Register, 2,083 project IDs on 10 November 2026, with its gate, technology, connection site, transmission owner and the date it takes effect. One switch turns the same view to the DNOs’ registers.
Filter it your way
By technology, size, gate, connection site, year and status. The filters travel in the link, so a colleague opens the same list.
See what moved
Months moved shows how far each project’s effective date has shifted since an earlier NESO publication you choose.
Evidence at a glance
Grid, planning, route to market and ownership, marked against every project.
Export, watch and follow
Export what you see, watch the projects you care about, and follow a project, a site or a customer by feed.
Project dossier
Open any project and see the whole case
A project’s dossier puts what NESO publishes beside the planning, contract and company records that bear on it, each marked with where it came from and whether a person has confirmed it.
Its record, dated
Stage, capacity, effective date and transmission owner as NESO publishes them, with each change of status its archived registers record.
Planning and contracts, confirmed
DESNZ planning records and CfD contracts are matched as candidates and count only once a person has confirmed them. On a planning link, Jev gives a second opinion; a person decides.
Evidence, scored
How much of the project is backed by a record Grid Guardian keeps or a link a reviewer confirmed, and how far its milestones have got, each out of 100.
An evidence pack to keep
The source rows, the matching method and your review history, in one download.
Distribution networks
All six DNOs, project by project
Each DNO’s Embedded Capacity Register is read from its own portal. Every connection of 1 MW and over is one you can open, watch, filter and export, beside the transmission queue rather than added to it.
UK Power Networks
Embedded Capacity RegisterDemand headroomNational Grid Electricity Distribution
Embedded Capacity RegisterDemand headroomSSEN Distribution
Embedded Capacity RegisterDemand headroomSP Energy Networks
Embedded Capacity RegisterDemand headroomNorthern Powergrid
Embedded Capacity RegisterDemand headroomElectricity North West
Embedded Capacity RegisterDemand headroom
Every monthly register, kept
A DNO replaces its Embedded Capacity Register every month and keeps no history. Grid Guardian keeps each one, so a target date that slips leaves a trace.
Headroom side by side
Each DNO’s own estimate of demand headroom at its substations, listed together in Where to connect, in the unit the DNO states.
Flexible or firm
Flexible (ANM) connections are told apart from firm ones, as each DNO publishes them.
Never added to TEC
Distribution megawatts are contracted volume. They are kept apart from the transmission queue and never added to it.
The grid map
The whole queue on one map
See where contracted capacity sits on Great Britain’s transmission network, then narrow it down.
Filter by technology, connection state and gate.
Play the queue forward to the year each step takes effect.
Add circuits, boundaries, interconnectors and the data centre pipeline.
Open any site to see its projects and where each figure comes from.
The workspace
Everything else, in the same place
Grid Guardian reads the registers that decide where and when a project can connect, keeps every publication it reads, and shows what each one says, side by side.
Where to connect
Name a place and see what the published registers say near it: the nearest connection sites and what is contracted there, distribution headroom, planning records and designations, and an indicative TNUoS charge.
Register changes
NESO republishes the TEC Register twice a week. Every change is dated and listed project by project, with planning changes beside them.
Connections Reform
Who is consenting to Gate 2 terms, from NESO’s Existing Agreements Register, and each project’s gate as the register prints it.
Grid charges
Transmission charges from NESO’s final TNUoS tariffs for 2026/27.
Constraint costs
NESO’s monthly constraint costs, beside what wind farms were paid to turn down and what gas plants were paid for accepted offers, from Elexon.
Europe live
GB generation and interconnector flows from Elexon, with European prices and border flows from ENTSO-E.
Data centres
The data centre pipeline, operational sites and AI Growth Zones, on the map beside the connection queue.
Companies House
The company behind a customer name, from its Companies House record, cited by company number.
API and MCP server
The same answers, each figure cited, for your own tools and for AI assistants.
Built on published data
Evidence you can check
Every figure in Grid Guardian is read from someone else’s publication, and it stays traceable to it.
Cited to the publication
Every figure names the publication it came from, its date and its licence, ready to paste into a report.
Kept, byte for byte
Each publication it captures is kept with the address it came from, the date it was fetched and a SHA-256 of its bytes.
Nothing filled in
Where a publisher leaves a figure blank, Grid Guardian leaves it blank, and it says when a newer publication exists.
Clear about what it is not
Contracted capacity is not capacity built, and it is not network headroom. Grid Guardian says so wherever it matters.
Sources and tools
Every source and tool, named
Grid Guardian cites 63 sources from the publishers below, each with its publication, date and licence. Grid Guardian publishes no data of its own.
Transmission
- NESO · TEC Register, Existing Agreements Register, Interconnector Register, ETYS boundaries, TNUoS tariffs, GSP regions, constraint flows and costs, and carbon intensity
Distribution
- The six DNOs · UK Power Networks, National Grid Electricity Distribution, SSEN Distribution, SP Energy Networks, Northern Powergrid and Electricity North West: each one’s Embedded Capacity Register and demand headroom
- Each DNO’s files, kept · every monthly register and headroom file, compared by Grid Guardian
Markets and balancing
- Elexon · BMRS: generation by fuel, demand, balancing acceptances and BM unit cashflows
- ENTSO-E · border flows and day-ahead prices, read through Rebase’s Grid API
- Fraunhofer ISE · Energy-Charts: European generation, interchange and prices
- European Central Bank · euro reference rates, through the Frankfurter API
Planning and consents
- DESNZ · Renewable Energy Planning Database
- Planning Inspectorate · national infrastructure projects
- Scottish Government · Energy Consents Unit cases
- MHCLG Planning Data · designations such as green belt and SSSIs, and local planning authorities
- PlanIt · planning applications
Contracts and companies
- Low Carbon Contracts Company · CfD contract portfolio
- Companies House · company profiles, by company number
Places and maps
- OpenStreetMap contributors · substations, read through Overpass and OpenGridMap
- PyPSA-GB · substation coordinates
- gb-grid · wind BM unit positions
- ONS Postcode Directory · postcode lookups, through postcodes.io
- Natural Earth · the coastline and place names
- OpenFreeMap · street tiles, from OpenStreetMap data
Data centres
- Global Data Center Map · data centre sites, by Ringmast4r
- thirsty-ai · data centre sites, by Yenlik Gaisina
- gov.uk · AI Growth Zones and Section 35 directions
- Developers and the press · public statements, each linked from its evidence row
The tools behind it
Jev
TypeSafe, on Cloudflare Workers AI
A second opinion on whether a planning record is the project it was matched to. Advice only: it never confirms or rejects a link; a person does.
Grid Guardian Worker
On Cloudflare Workers
Reads each publisher’s newest file on its own schedule, the TEC Register every hour, and keeps what it reads.
Rebase Grid API
Rebase
ENTSO-E’s border flows and day-ahead prices, for Europe live and the interconnectors on the map.
API and MCP server
Grid Guardian
Every answer with its data, its sources and its limits, for your own tools and for AI assistants.
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