National Gas Transmission Data Portal (UK)

Most gas statistics describe a month that already happened. This one describes the pipeline right now. The portal is the redesigned successor to the Market Information Provision Portal (MIPI) and carries the system operator's own within-day picture of Great Britain's National Transmission System - every entry point, LDZ offtake, storage site and LNG installation on the network.

Three views do most of the work. The Gas system status section (formerly Prevailing View) shows actual and forecast demand against seasonal normal, actual and forecast supply broken out by entry point and terminal, opening versus predicted closing linepack, margins notice triggers, storage stock year-on-year and gas deficit warnings for the current Gas Day. The Find gas data catalogue exposes roughly 12,300 documented data items in a tree spanning Balancing, Demand, Entry Capacity, Exit Capacity, Interruption, Linepack, LNG, Notices, Price, Shrinkage, Storage, Supplies, Weather and Calorific Value - each item published with its frequency, publication time and unit of measure. And an instantaneous flow feed reports physical flow rates on a two-minute cycle from terminals including Easington, St Fergus, Teesside and Theddlethorpe.

In Datadory's catalog of 1,744 datasets across 159 viable industries, this record scores 8/10 for quality and anchors the gas utilities shelf as the only realtime feed in a sixteen-dataset slice where everything else is daily, monthly, quarterly or annual. Nothing else in the catalog puts you inside the operator's control-room view of a national gas network.

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Captured during the August 2026 research pass, straight from two different feeds so you can see both shapes the dataset takes. The first is a flow row; the second and third are gas quality rows.

Supply from entry points    ALDBROUGH
Published Time              21/08/2026 13:00
Value                       0
Timestamp                   21/08/2026 12:48:00
Expired (Y/N)               N
Amended (Y/N)               N

site                        AberdeenOT
area                        Scotland (SC)
publishedtime               21/08/2026 12:40
carbonDioxideContent        1.84
24HravgCalorificValue       40.40
calorificValue              40.31
nitrogenContent             0.725
wobbeIndex                  50.56

site                        AlrewasEMOT
area                        East Midlands (EM)
publishedtime               21/08/2026 12:40
carbonDioxideContent        2.22
calorificValue              40.73
wobbeIndex                 50.52

Reading the rows: the flow record pairs a publication stamp (13:00) against the measurement it describes (12:48), so twelve minutes is the worst-case staleness you inherit at this cadence - and the four Y/N flags tell you whether any later revision has superseded the row. Calorific values cluster tightly around 40-41 MJ/scm while CO2 swings from 1.84% to 2.22% between a Scottish terminal and a Midlands offtake, which is exactly why gas is traded in energy units rather than volume: the same cubic metre delivers different heat depending on where in the country you meter it.

Two schemas carry the realtime feeds; the wider catalogue adds category-specific columns behind them. The core spine, verified against live rows during the August 2026 review:

Beyond these, the catalogue documents roughly 12,300 items whose column sets vary by category - capacity positions carry bid/ask structure, storage items carry stock and injection-withdrawal rates, notices carry trigger levels and effective times. Those ride along under additional fields on request: name the categories you want with your sample and they ship in the same tables.

Three chips, honestly drawn:

• Geography - Great Britain's National Transmission System only: every entry point and terminal (Easington, St Fergus, Teesside and Theddlethorpe among them), every LDZ offtake, storage site and LNG installation. Northern Ireland and continental European systems sit outside it.
• Temporal - the current Gas Day forward through forecasts to D-7, backward into historical archives reachable through the catalogue tree. Historical gas-quality downloads keep covering locations even after they drop off the current report.
• Granularity - two-minute instantaneous flows at terminals; hourly and daily publications for capacity, demand, balancing and storage items.

One structural fact to plan around: the two-minute cadence applies to the physical flow feed alone, not the whole catalogue. Each of the roughly 12,300 items declares its own frequency and publication time, so a model built on linepack runs on a slower clock than one built on terminal flows - and the four Y/N flags mean yesterday's rows can be amended rather than frozen, unlike statistical series elsewhere in the slice that are never revised once published.

API, files, or your warehouse. Daily, weekly, or hourly.

The tables land however your stack wants them - pushed to storage, served over an endpoint, or synced straight into your database. Name the fields, the categories and the cadence when you request the sample; the sample ships first either way.

Operator-grade within-day visibility earns its keep in specific jobs:

• Data scientists & ML engineers - build short-horizon GB supply-demand and linepack forecast models on a feed whose freshest rows are minutes old, with Y/N flags already separating clean observations from amendments.
• Investors & quants - read within-day system balance, margins notice triggers and storage stock year-on-year as physical context behind NBP price moves, at a granularity no statistical agency publishes.
• Energy traders & analysts - track terminal-level flows and calorific values to explain why the same volume delivers different energy across the country, and watch linepack headroom ahead of intraday re-nominations.
• Developers & data-product builders - wire live system status into dashboards and alerting without reverse-engineering a control room; the schema is stable and every catalogue item documents its own frequency and unit.
• Market researchers & consultants - characterize Great Britain's gas-day operations with figures published by the network's own operator rather than estimates derived from them.
• Journalists & academics - cite supply, linepack and storage figures straight from the system operator during security-of-supply stories and energy-transition research.

Three things worth knowing upfront. First, geography is a hard boundary: this is Great Britain's network only, so if your question spans continental interconnectors you want the ENTSOG Transparency Platform alongside it rather than instead of it. Second, cadence is uneven by design - two minutes for terminal flows, hourly or daily for capacity and balancing items - so decide which clock your use case actually runs on before fixing the delivery schedule. Third, recent rows can be revised: the Expired, Amended, Substituted and Late received flags exist precisely because within-day figures get corrected, so treat the newest row as provisional until its flags settle. Name the feeds, the categories and the cadence when you ask, and the sample arrives cut to match.

Four complements cover what a single national control-room view cannot:

• ENTSOG Transparency Platform - per-interconnection-point flows, nominations and capacity across the whole continental network since 2007. Pairing them puts Great Britain's two-minute detail inside a European frame.
• EIA Natural Gas Data Portal - the American mirror image: statistical depth on US supply, storage and prices. Together they bracket how two major gas markets report themselves.
• EIA Weekly Natural Gas Storage Report and Natural Gas Weekly Update - weekly US working gas levels to set beside GB storage stock year-on-year, useful for cross-basin inventory narratives.
• Global Gas Infrastructure Tracker - asset-level context on LNG terminals and pipelines worldwide, for when the question widens from system state to infrastructure footprint.

Browse the full set on the best gas utilities datasets ranking or the gas utilities data hub. For the terminology, start with what the National Transmission System means. For a direct head-to-head, see ENTSOG Transparency Platform vs National Gas Transmission Data Portal (UK).