GB Demand26,094 MW
Free · Open data · Not trading advice
Live UK energy data, right now.
Power, gas, renewables and weather signals from open UK data — explained in plain English. How this site works
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System Price£200.52/MWh
Wind Generation5,928 MW
Wind Share24.3%
Gas Demand175 mcm/d
Net Interconnector−1,822 MW
Renewable Share24.3%
System StatusWATCH
Carbon Intensity173 g/kWh
Market brief
Right now the system price is elevated at £200.52/MWh; GB demand is 26,094 MW; renewables are supplying 24.3% of generation; and interconnectors are providing a net export of 1,822 MW. Overall short-term system pressure is moderate.
Automated, rule-based summary
Fast read
UK Energy Today
DemandChecking
WindChecking
GasChecking
Cross-borderChecking
RenewablesChecking
System pressureChecking
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Learn the market one concept at a time.
Plain-English lessons, a daily challenge using real data and a replay of a completed settlement day.
Key charts
The views that matter now
Hover or tap a chart for exact values and times. Use ⋯ to download data.
GB Demand — Last 24 Hours
Generation Mix
Carbon intensityChecking…
UK Weather — London
☁
—Loading forecast…
- Wind
- —
- Precipitation
- —
- Forecast time
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Derived insightsResidual demand, import cover, gas weather signal and wind forecast error
Free derived insights
What the live numbers imply
Calculated from existing open feeds—no extra paid data.
Demand left after reported wind and solar output.
Net interconnector flow as a share of current demand.
Gas demand compared with the seasonal normal.
Wind, solar and hydro share of current generation.
Wind forecast error
Awaiting overlapping forecast and actual data
- Forecast
- —
- Actual
- —
- Miss
- —
14-day accuracy loading…
What if…? Scenario sandboxChange wind, demand, imports and outages together and see how the balance shifts. Simple arithmetic — not a forecast
Residual demand = demand − wind − solar. Left for GB flexible plant = residual demand − net imports + extra outage. Starts from the latest readings. Real outcomes also depend on storage, constraints, reserve and the system operator's actions, so this is a teaching aid, not a forecast.
Deeper analysisTrading Desk Lens and the detailed market-driver breakdown
Trading Desk Lens
Price pressureLoading…
Waiting for the latest market observations.
System balanceLoading…
Waiting for the latest imbalance volume.
Weather & renewablesLoading…
Waiting for generation and weather data.
Gas & cross-borderLoading…
Waiting for gas and interconnector data.
What’s Driving the Market?
Generation mix loadingWaiting for the latest NESO observation.
System price loadingWaiting for the latest settlement period.
Demand loadingWaiting for the latest Elexon observation.
Renewables loadingWaiting for generation data.
7 and 30-day historyDaily averages for demand, renewable share and system price — sortable and downloadable
UK electricity
Power
System price, imbalance, demand and settlement-period context from open GB sources.
Market stage now
- Day-aheadTomorrow's auctions
- IntradayTrading continues
- Gate closure1 h before delivery
- Real-time balancingCurrent period
- SettlementPrices published after
Working out the current settlement period…
System Price
Latest price£200.52/MWh
Net imbalance volume—
Market Index Price
Latest period—
Today's range—
Traded volume—
Loading Market Index Data…
A short-term reference price: the volume-weighted price of power traded on the spot exchange for each half-hour (Elexon Market Index Data). It is not the day-ahead auction price and not a forecast.
30-Day GB Demand
Waiting for the latest settlement period.
Waiting for the latest cash-out price.
Rule-based context using absolute NIV and system price. This is not an official system warning or trading signal.
How to read balancing data
A larger absolute NIV indicates more balancing action in the settlement period. Read the magnitude alongside system price and adjacent periods; the NIV sign alone should not be treated as a buy or sell instruction.
Reported Generation Unavailability
Unavailable now (reported)—
Unplanned—
Planned—
National surplus (NESO)—
By fuel
Largest unplanned outages
Loading reported outages…
Self-reported REMIT unavailability messages that are active now. Messages can overlap, be revised or be withdrawn, so this is an indicator — not an official availability or security-of-supply figure.
UK gas system
Gas & LNG
Gas balance, linepack and free operational LNG terminal signals for a clearer view of UK supply.
Current Gas Day
Actual demand—mcm/day
Seasonal normal—mcm/day
Opening linepack—mscm
Predicted close—mscm
Physical supply—mscm
Forecast supply—mscm
Supply by Source
Loading supply data…
UK LNG Terminal Monitor
A free operational view of LNG already inside the UK terminal system. Stock and send-out help gauge short-term gas-system cover; they do not identify individual ships or cargo origins.
Terminal stock—GWh
Daily send-out—GWh/day
Available capacity—GWh
Implied days of cover—at latest send-out
Loading National Gas LNG publications…
Loading terminal data…
Shipping context
How to read UK LNG activity
Britain’s three import terminals are Grain LNG on the Thames and Dragon LNG plus South Hook LNG at Milford Haven. A rise in terminal inflow can be consistent with unloading or inventory movements; rising send-out means more regasified LNG is entering the transmission system.
Stock risingPotential replenishment or lower send-out. Confirm against terminal flow and dates.
Send-out risingLNG is contributing more gas to the NTS, which may ease other supply requirements.
Stock fallingInventory is being drawn. The significance depends on demand, pipeline imports and storage.
Vessel caveatFree terminal data cannot confirm a ship’s identity, cargo origin, destination or arrival time.
Great Britain LNG Terminal Storage
A storage indicator for LNG held at Britain’s three import terminals. It is not a measure of all GB underground gas storage.
Terminal inventory—GWh
Reported available space—GWh
Implied terminal fill—stock ÷ stock plus space
Daily change—versus prior publication
European storage context Comprehensive EU storage levels are available from GIE’s AGSI+ public dashboard; they are not copied here without a licensed API connection.Open AGSI+ ↗
Generation transition
Renewables
Current renewable share, actual wind and solar output, and the latest day-ahead forecast.
Current renewable share—
30-day average—
Leading source—
GB Generation Mix — 30 Days
Carbon Intensity — Next 24 Hours
Now—
Lowest in next 24 h—
Highest in next 24 h—
Loading carbon intensity forecast…
Latest output—
48-hour peak—
48-hour average—
GB Wind Generation — Last 48 Hours
Loading wind output…
Latest output—
48-hour peak—
Daylight average—
GB Solar Generation — Last 48 Hours
Loading solar output…
Forecast wind peak—
Forecast solar peak—
Latest publication—
Wind & Solar — Day-Ahead Forecast
Loading generation forecast…
Wind Forecast vs Actual — Today
Mean absolute error—
Average bias—
Waiting for overlapping forecast and actual intervals…
Wind Forecast Accuracy — Last 14 Days
14-day mean absolute error—
14-day average bias—
Biggest miss—
Loading 14 days of forecast and outturn…
Weather-sensitive fundamentals
Weather
Regional temperature, wind and precipitation conditions across major UK energy-demand centres.
London Forecast
☁
—Loading forecast…
- Wind
- —
- Precipitation
- —
At-a-glance conditions
UK Regional Snapshot
Select an area to open its detailed forecast.
Loading regional forecasts…
London Wind — Next 48 Hours
Current wind—
Current gust—
Direction—
London Temperature — Next 48 Hours
London Precipitation — Next 48 Hours
How to use this view
Compare regions for demand sensitivity, then select an area for its 48-hour temperature, wind and rain profile. Each area uses a representative city point, with Met Office data when available and an automatic Open-Meteo fallback.
UK infrastructure
Networks
Current GB electricity imports and exports across operational interconnectors. See every link on the UK Power Map.
Interconnector Outturn
Total imports—
Total exports—
Net flow—
Loading network flows…
Loading interconnector data…
Neighbouring Day-Ahead Prices
Today's day-ahead auction prices in the markets GB trades with through interconnectors. Power usually flows towards the higher-priced market, but GB has no coupled day-ahead price in this dataset, so compare with care. Context only — not GB prices or a forecast.
Loading European prices…
UK energy market context
Markets
Delayed energy and industrial commodity benchmarks selected for their relevance to UK power, gas and North Sea fundamentals.
Delayed reference dataThese are end-of-day or monthly observations—not executable or live trading prices.
Loading cached market observations…
Brent crude history
Loading market history…
GB electricity reference prices
What is open, and what is not
Each price is labelled by what it measures. None is a forecast or an executable price.
Market Index Price (MID)
—Volume-weighted spot-exchange price for the latest half-hour, published by Elexon as open BMRS data.
GB day-ahead auction price
Not republishedGB day-ahead auctions run on EPEX SPOT and Nord Pool (N2EX). Their results are exchange data that this site will not republish without a licence. Check the official sources directly.
Neighbouring day-ahead prices
Loading…
Energy-Charts / SMARD.de · CC BY 4.0 · EUR/MWh.
Carbon pricing
UK ETS
Intentionally not shownLicensed exchange data · not republishedUK Allowance prices are a material GB power-market input, but this site will not republish a commercial exchange price without a suitable licence.
Official UK ETS information ↗European context
EU ETS
Intentionally not shownLicensed exchange data · not republishedEU Allowance prices remain useful cross-market context. A chart will be enabled when a dependable, redistributable source is available.
European Commission overview ↗Historical context
Analysis
Historical comparisons, forecast accuracy, seasonal context and a UK energy publication calendar.
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Fast numerical review
Last 30 completed days in numbers
Daily values make it easier to compare specific sessions without reading a chart.
GB electricity demand
Completed-day average demand and its change from the previous published day.
| Date | Demand | Day-on-day |
|---|---|---|
| Loading demand history… | ||
GB renewable share
Wind, solar and hydro combined, with movement shown in percentage points.
| Date | Renewables | Day-on-day |
|---|---|---|
| Loading renewable history… | ||
Optional visual context
Trend charts
GB Demand
GB Renewable Share
Compared with the same time across recent comparable days.
Compared with National Gas seasonal normal.
Compared with the recent 30-day distribution.
Range across today’s published settlement periods.
Interpretation
Electricity normal is a rolling same-time comparison rather than an official climatological normal. Gas seasonal normal is published by National Gas. These measures are descriptive, not forecasts.
Similar Demand Days
The closest previous days ranked by absolute difference from the latest daily average GB demand.
Loading comparable days…
30-day relationship
Demand vs renewable share—Calculating correlation…
Waiting for matching demand and generation dates.
Correlation describes co-movement, not causation. Daily averages can hide strong intraday effects.UK Energy Calendar
Energy statistics releasesDESNZ · electricity, gas, renewables and pricesSystem publicationsNESO · operational and market reportsDecisions and consultationsOfgem · regulation and market noticesUK ETS auctions and noticesUK Government · allowance-market publicationsEconomic and industrial releasesONS · inflation, production and economic contextGas operational publicationsNational Gas · demand, linepack, supply and LNG
Power and balancing
Elexon Insights supplies GB demand, system price, net imbalance volume, wind/solar actuals and interconnector outturn. Near-live data is refreshed every 15 minutes.
Generation and renewables
NESO Carbon Intensity generation percentages are grouped into gas, wind, nuclear, solar, hydro, coal and other. Renewable share is wind, solar and hydro combined.
Gas and LNG
National Gas supplies current Gas Day demand, seasonal normal, linepack, supply and delayed LNG terminal publications. Implied LNG fill equals stock divided by stock plus reported available space.
Weather
Met Office point forecasts are preferred. Open-Meteo is used as a clearly-labelled fallback when the Met Office quota or endpoint is unavailable.
Markets
Daily oil and US gas series are sourced from EIA data distributed by FRED. Monthly copper is IMF data distributed by FRED. They are delayed reference observations.
Calculated indicators
UK Energy Today and Trading Desk Lens use deterministic thresholds. They describe current pressure and do not predict prices or provide trading advice.
Known limitations
Source revisions, publication delays and missing intervals can occur. Carbon prices, comprehensive GB underground storage and plant-level outage data remain unavailable until suitable redistributable feeds are connected.
What's coming up
UK energy calendar
Dated NESO, Ofgem, DESNZ, Capacity Market and CfD events, each with a short note on why it matters for the live data on this site.
Loading the calendar…
Confirmed = date fixed by the publisher. Provisional = the publisher gives a month only. Indicative = an expected window from a published timetable or reporting, which can move. Dates are taken from each organisation's own pages where possible and can change, so check the linked source before relying on one. Notes explain context; they are not a view on policy.
For regular publication cadences (monthly statistics, NESO reports, Ofgem decisions), see the official links under Analysis → Energy Calendar.
Source transparency
Data sources, freshness & health
A separate record of what powers the dashboard, why the APIs can be used free of charge, when observations were published, and whether each connection is working.
Connected data feeds
Current source status
Open-data model
Why these APIs are free to use
Most are public-interest datasets published by UK system bodies. Free access does not remove attribution, fair-use, quota or licence requirements.
Elexon Insights
Free · no keyGB demand, system price, net imbalance volume, wind/solar outturn and day-ahead forecasts, interconnector flows, Market Index Data (an intraday reference price) and REMIT outage messages. Elexon publishes Balancing and Settlement Code data for public market transparency.
Official API documentation ↗NESO Carbon Intensity
Free · no keyGeneration mix and carbon-intensity data from the National Energy System Operator’s public service. UK Energy Insight derives renewable share from wind, solar and hydro.
Official service ↗National Gas Data Portal
Free public dataGas demand, supply, linepack and LNG terminal publications. Some datasets arrive on operational schedules rather than in real time and can later be revised.
Official data portal ↗Met Office DataHub
Free allowance · API keySite-specific UK forecasts. The free subscription has quota and product limits, so Open-Meteo is used as a clearly labelled fallback if the allowance or endpoint is unavailable.
Official DataHub ↗Open-Meteo
Free non-commercial accessRegional forecast fallback using open weather models. It keeps learning views usable but is never silently presented as Met Office data.
Official API documentation ↗FRED, EIA & IMF
Free delayed seriesReference oil, US gas and copper observations. These are delayed daily or monthly context series—not live tradable prices or exchange quotes.
FRED data service ↗Energy-Charts / SMARD.de
Free · CC BY 4.0Today's day-ahead prices in neighbouring markets (France, Belgium, Netherlands, southern Norway, western Denmark), republished by Fraunhofer ISE from Bundesnetzagentur | SMARD.de under CC BY 4.0. Cached for six hours because the source allows about two requests a minute. GB day-ahead exchange prices are not openly licensed and are not shown.
Energy-Charts API ↗Reliability
Automated checks are built in
The browser checks for usable feed responses on load and every 15 minutes. A separate scheduled GitHub check visits every public page, API route and cited external source each morning, and fails visibly if a link disappears or a service returns an error.
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Terms of use
Last updated 27 September 2026.
Information and learning only
UK Energy Insight explains the UK energy system using public and third-party data. It is not financial, investment, trading, legal or professional advice, and it does not recommend any transaction.
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Feeds may be delayed, unavailable, incomplete or revised by their publishers. Derived labels and summaries are explanatory calculations, not official system warnings or forecasts. Check the named primary source before relying on a figure.
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Last updated 24 September 2026.
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About & methodology
How UK Energy Insight works
Who builds it, the principles behind it, where every number comes from and what the site will not do.
Who builds it
UK Energy Insight is built and maintained by Pacedall Labs Ltd, a London technology studio (Company No. 16619412). It is free to use, has no accounts and carries no advertising.
Questions, corrections and suggestions are welcome through Contact & feedback.
Design principles
- Open data only. Every live figure comes from a free, public source that allows reuse. Commercial or exchange data is linked, not republished.
- Never invent a value. When a feed is late or down, the last good reading is shown with its time, or the card says it is unavailable.
- Show the evidence. Each reading is labelled measured, calculated, forecast or rule-based, with its source and observation time.
- Explain, don't advise. Interpretations are plain-English, rule-based summaries for learning — never trading advice or price forecasts.
- Privacy first. No tracking or analytics cookies. Preferences stay on your device and only with your permission.
Data sources & licensing
- Elexon Insights (BMRS)
- Demand, system price and NIV, wind and solar outturn and forecasts, interconnector flows, Market Index Data and REMIT outage messages. Open BMRS data, used with attribution.
- NESO
- Generation mix and carbon intensity (Carbon Intensity API, CC BY 4.0), operational margin, constraint costs and balancing carbon.
- National Gas
- Gas Day demand, linepack, supply and LNG terminal publications.
- Met Office / Open-Meteo
- Regional forecasts (Met Office DataHub free tier) with a labelled Open-Meteo fallback.
- FRED / EIA / IMF
- Delayed oil, gas and copper reference series.
- Energy-Charts / SMARD.de
- Neighbouring day-ahead prices, CC BY 4.0 (Bundesnetzagentur | SMARD.de).
Full freshness and status for every feed is on Data sources.
How the rule-based interpretations work
The system status, pressure label and market brief use fixed, published thresholds — no machine learning or black-box models.
| Label | Rule |
|---|---|
| TIGHT | System price ≥ £300/MWh, or net imbalance volume ≥ +1,000 MWh (system short) |
| WATCH | System price ≥ £150/MWh, or NIV ≥ +500 MWh |
| SURPLUS | System price below £0/MWh, or NIV ≤ −800 MWh (system long) |
| NORMAL | None of the above |
| Pressure score | +1 each for price ≥ £150, price ≥ £300, NIV ≥ +500, demand > 5% above its recent same-time average, gas demand > 5% above seasonal normal, wind > 500 MW below forecast; −1 for net imports > 1,000 MW or NIV ≤ −500; −2 for a negative price. ≥3 high, 2 elevated, 1 moderate, otherwise low. |
| Residual demand | Demand minus reported wind and solar outturn for the same half-hour. |
Freshness: each feed has a normal publication cycle (for example 1.5 h for the generation mix, 5 h for wind outturn, 36 h for LNG). Older readings are flagged as delayed, not wrong.
Open API
The headline readings, rule-based status and market brief are available as JSON for reuse, with CORS enabled:
GET https://ukenergyinsight.com/api/v1/summary
GET https://ukenergyinsight.com/api/v1/derived/api/v1/derived returns residual demand, import cover, wind forecast error, renewable and wind share and gas demand against normal, each with its formula, inputs and observation times, plus the rule-based pressure score with every rule's contribution.
Responses are cached for five minutes and limited to 30 requests per minute per client. Please credit UK Energy Insight and the original data owners. The contract is versioned (apiVersion) and educational only.
Also available: /api/health — when each headline source last updated and whether it is on schedule, delayed at source, or showing its last good reading; and /feed.xml — the daily market brief as an RSS feed (no sign-up, no email address needed).
Limitations & disclaimer
- Sources publish on different schedules; readings on one screen can describe different times. Always check the “as of” time.
- Values can be revised by the publisher after first release.
- Calculated values (shares, residual demand, import cover) are simplified for learning.
- Outage figures are self-reported REMIT messages and can overlap.
- UK Energy Insight is an information and learning service. It is not a trading, clearing or settlement system and nothing here is financial, investment or trading advice.
See also the Terms and Privacy notice.
UK energy reference
UK Energy Wiki
Plain-English definitions, acronyms, units and market concepts for electricity, gas, LNG, renewables, networks and trading.
70+reference terms
No matching Wiki term. Try an acronym, a unit or a broader phrase.
UK energy learning
Learning
Understand the UK energy market through clear explanations, real historical data, and guided exercises.
Start here
Read the market in three steps
Check the timestamp
A figure is only useful when you know when it was observed. “Live” feeds can still publish late or revise a period.
Compare demand and supply
High demand, lower wind or reduced imports may leave more generation to be supplied by gas or flexible assets.
Inspect price and balance
System price is an imbalance price, not a household tariff or a day-ahead auction price. Check its settlement period and NIV.
Core UK energy terms
UK energy glossary
Search short definitions, then use the same terms when reviewing market data.
Settlement period
A numbered half-hour of the GB electricity market. The day usually has 48 periods; clock changes can alter that count.
System price
The cash-out price used to settle electricity imbalances for a period. It is not the same as a day-ahead wholesale price.
Net imbalance volume (NIV)
A measure of net balancing actions in a settlement period. Its magnitude helps show how much balancing occurred.
Day-ahead price
A price from an auction for delivery on the following day. This site does not yet publish a verified day-ahead price feed.
Balancing Mechanism
One of the tools the system operator uses to adjust generation or demand close to real time.
Long and short
In an illustrative market position, a long position benefits when the relevant price rises; a short position benefits when it falls. Real settlement depends on the actual market rules and contract.
MW
Megawatt measures a rate of power at a moment in time, such as the current level of demand or wind output.
MWh
Megawatt-hour measures a quantity of energy. One megawatt sustained for one hour produces one MWh.
Renewable share
The share of generation supplied by wind, solar and hydro in this dashboard. It is not a forecast of the next settlement period.
Residual demand
The electricity demand remaining after weather-driven generation such as wind and solar is accounted for.
Interconnector
A cable connecting GB with another market. Imports add supply to GB; exports send electricity out of GB.
Linepack
The gas held within the high-pressure transmission network. It offers short-term flexibility, not seasonal storage.
No matching term. Try a broader energy-market word.
Short explanations
Why markets move
Why can the system price become negative?
When the system has excess supply and needs to reduce generation or increase demand, balancing actions can make the imbalance price negative. A negative price does not mean all electricity is free; it applies to a specific market settlement context.
Inspect system price and NIV →What if wind generation misses its forecast?
If actual wind is below a forecast, other sources may need to fill the gap. The effect depends on demand, available gas generation, imports, storage, constraints and the time of day. A forecast miss is a clue, not a guaranteed price move.
Inspect wind forecast error →What does a net power import tell us?
Net imports add electricity supply to GB, but the net figure can hide opposing flows on individual links. Compare the link-level outturn with demand, generation and prices on both sides of the border.
Inspect interconnector flows →Historical learning exercise
Daily market challenge
Loading a completed historical day…
Current streak0 days
Today0 of 3 questions
Concepts completed0
Best streak0 days
Loading source observations…
Historical outturn is shown for learning. It is not a forecast, tradable signal or evidence that an analyst could have known every value in advance.
Annotated recent history
Five recent days worth studying
Picked automatically from the last 30 completed days of published data: the highest and lowest prices, the highest and lowest renewable share (a dunkelflaute-style day) and the highest demand. Each note is generated by transparent rules from that day's numbers, followed by what happened the next day.
Open the Learning page to load recent days…
Rule-based annotations of published outturn. They describe what the data shows, not why markets moved, and are not a forecast.
See the sequence
Historical settlement-day review
Choose a completed day from the past month, then review it period by period. Missing source values remain visibly unavailable.
Choose a date to begin.
——
System price—
GB demand—
Wind share—
Net imbalance volume—
Source: Elexon Insights and NESO Carbon Intensity. These are retrospective observations, not a record of information available before each period.
See the sources
Current data, clearly attributed
The read-only learning data snapshot shows the latest available system price, NIV, demand and generation shares with units, observation times and source names. Unavailable values are clearly identified; a day-ahead price is not currently connected.
Loading source details…