Transmission operational data

This page contains gas transmission data for industry analysts, including operational data for all industry stakeholders. We provide this information to reduce market uncertainty, ensure equal access to information, and increase information transparency. Our goal is to increase efficiency in the capacity and energy markets, while providing fair and timely access to operational and market information.


Gas market data tools

You can use these tools to access and capture gas transmission data.


Supplementary reports

Daily storage and LNG operator information

The information contained in this spreadsheet is published on behalf of Storage and LNG Operators under the European Regulation EC 715/2009. The data in this spreadsheet is applicable for the current gas year. Data from previous gas years can be found in the next tab.

Calculated linepack utilisation

The report below collates the hourly supply and demand flow notifications received from NTS connected sites to calculate the NTS linepack minimum value in MCM that would result from these flow profiles. Please note, connected parties update their notifications continually throughout the day; therefore, the report is accurate only at the point of publication. The report is published three times throughout the day (06:00, 12:30 and 18:30) and will reflect latest Linepack and revised supply and demand flow notifications received.


We have developed a suite of pre-recorded webinars to provide guidance to the industry to aid decision-making. We are conscious that many of our operational customers work non-standard hours, so we felt that pre-recorded webinars would be beneficial as these can be viewed flexibly at times to suit operational needs.

2017 webinars

Similar to last year, this year’s Winter Webinars have been pre-recorded to help provide more conveniently presented guidance and information. We fully appreciate that many of our operational customers work non-standard hours and therefore felt that pre-recorded webinars would be beneficial as these can be viewed at times that suit individual operational needs.

Having initially reached out to our customers, to ask which subject areas would be useful, the following suite has been put together. This includes:

Gas system pressures and operational tools

  • Recap summary of what affects NTS pressure
  • What has changed recently
  • What information is available from National Grid
  • What further information is being explored to help with pressure issues
  • Daily Agreed Gas Pressures Process & Operating Margins

Emergency exercise

  • NEC background
  • Gas Deficit Emergency Stages and Actions
  • Information on Exercise Yield

Locational trades/constraint management

  • Description of what Locational Energy Actions are
  • How National Grid communicates in the event of a Locational Action being carried out
  • A working example

REMIT platform 

  • Overview of GB Remit Policy
  • Navigating round the platform, including how to post an urgent market message

SO key documents 

  • Documents covered: Winter Outlook/Review & Consultation + Gas Ten Year Statement/Future Operability Planning + Future Energy Scenarios
  • Content includes where the documents are published, how often they are published and what information they include for

MIPI – common queries 

  • To include top 10 MIPI queries, including:
  • Storage & LNG report – discrepancy in figures
  • API’s – how to register
  • CV missing data
  • Actual offtake flows – missing data

Gas Operational Forum

  • Summary of general topics covered
  • Who attends?
  • Promote the changing nature of the forums – more interactive

Pre-emergency notifications

  • Gas margins/deficit warnings
  • Safety monitors

Over the past three years, we have utilised both live webinars and standard presentations to share information with the industry which has been accessed over 1,000 times. Thank you for your interest in these and please note we are striving to improve the media of communication used and to ensure that the topics presented are of value to our customers.

Should you have any questions in relation to any of the featured webinars, please do not hesitate to contact the Operational Liaison team at [email protected] who will be able to put you in touch with the appropriate subject matter expert.

Gas query directory

To help you efficiently find the right person to talk to in relation to specific operational gas queries, we have developed the following a contact list and directory. We have based it on the most common queries we receive from our customers. Its purpose is to make finding the right subject matter expert within National Grid, quicker and easier than ever before.

Download the directory