Checking official data…
Britain’s electricity, explored.
Live demand, supply, carbon and cross-border flows in plain English.
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National generation mix
Where is Britain’s electricity coming from?
—largest source
Percentages and MW can have different official timestamps; unavailable values stay unavailable.
The national mix does not identify the exact physical electricity delivered to an individual home.
What stands out
Plain-English signals
Deterministic comparisons computed from this site’s verified stored history.
Calculating evidence-based comparisons…
Explore the system
The electricity map
Geographic country outlines, real asset coordinates and indicative cable paths between documented landing points. Routes are not survey-grade.
Map data loads when needed.
WindSolarOther generationStorageMoving toward GB = importMoving away from GB = export
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Cross-border power
Operational interconnectors
Loading official half-hourly flows…
| Cable | System | Direction | Flow | Capacity | Use | Observed |
|---|
Replay preserved observations
Travel through the grid
No interpolation: every step is a reading actually stored by this site.
Previous/next, arrow keys and the slider move between preserved readings. Playback advances at one stored interval per second.
Preserved history
See how the grid changes
Loading the available historical range…
Demand and generation
Published demand compared with positive generation and imports.
Loading preserved readings…
Total imports and exports
Official half-hourly magnitudes.
Flow by cable
Above zero imports; below zero exports.
Generation by reported fuel
Stacked observed MW; missing fuel makes an interval blank.
Wind and solar: reported vs forecast
Reported values may be revised; forecasts are day-ahead.
Carbon intensity
Lower is cleaner.
Renewable and low-carbon share
Low-carbon adds nuclear.
Since recording began
Records held by this site
These are not all-time UK records.
Calculating verified records…
Generation asset explorer
What is built, and where
Major operational assets selected by published capacity thresholds. Capacity is not live output.
Map data not loaded yet.
| Asset | Technology | Capacity | Location | Status |
|---|
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Method, licences and limits
Honest about what each value means
Live generation, demand and interconnector flows come from Elexon Insights. Carbon intensity and percentage mix come from the official Carbon Intensity API. Renewable and storage asset metadata comes from DESNZ REPD; the locally hosted geographic basemap is public-domain Natural Earth data. Cable paths are indicative joins between documented endpoints, never survey-grade subsea geometry. The private SQLite database never reaches the browser.
Why can demand and generation differ?
Feeds use different definitions and timestamps. Embedded generation, station use, storage and losses can create a gap.
Does an asset marker show live output?
No. Every mapped generation or storage asset is labelled capacity-only. A national technology chart is context, not an allocation to that site.
How does time travel handle gaps?
It selects stored observations only. It never interpolates; unavailable or stale source values are shown plainly.
How is history compressed?
Recent readings remain detailed. Older public charts retain observed hourly or daily records while full-resolution history stays in private SQLite.