Unidentified Gas (UIG)

This page provides background information about Unidentified Gas and links to other useful material.

Using the data supplied by the gas industry, our daily processes calculate Unidentified Gas (UIG) levels. UIG is an amount of gas that cannot be directly attributed to any system user. A major part of our work is supporting the gas industry to understand, manage and resolve UIG in a better way.

Understanding Unidentified Gas

In our role of managing the Supply Points database, we provide:

  • Forecasts of current day gas demand per system user
  • Forecasts of next-day gas demand per system user
  • Allocation of the total actual system usage

This work groups sites by geographical location and size of their typical annual usage.

This process is designed to make daily gas allocation fair and transparent, and to reveal UIG levels. 

However, with less than 20% of annual usage and around 1,000 sites submitting daily reads into the allocation process, the remainder of gas is allocated based on estimates and sample data.

UIG is also corrected over an extended period of time. This means higher and less predictable levels of UIG than expected and significant challenges for gas shippers.

 

The UIG Task Force

The gas industry has asked us to lead on fixing the problem, and our UIG Task Force is investigating and making recommendations on how to reduce UIG levels and volatility. We have increased our analytical capability by working with our external analytics partner, which has allowed us to use advanced technology. This, in turn, helped us to:

  • Investigate and report on the causes of and contributors to Unidentified Gas
  • Make suggestions to the industry on how levels and/or volatility of Unidentified Gas might be reduced.

Below are links to all updates shared with customers and industry colleagues regarding Task Force publications.

Download the LATEST UIG Investigation Tracker – 1st May 2019

Download the LATEST UIG Investigation Tracker

Last updated on 01 May 2019

Unidentified Gas (UIG) Xoserve Task Force Investigation Guide – February 2019

The UIG Task Force has put together an Investigation Guide, describing the areas we have investigated so far and why they are important to UIG. It details the results of each finding and how much UIG they can explain, as well as Xoserve's recommendations on how the industry can work to resolve the issue.

 

Unidentified Gas (UIG) – Task Force Investigation Guide – February 2019

Last updated on 15 Feb 2019

Task Force Publications

Below are links to all updates shared with customers and industry colleagues regarding Task Force publications.

UIG Task Force Update - 3rd May 2019

Last updated on 03 May 2019

UIG Task Force Update 27th March 2019

Last updated on 27 Mar 2019

UIG Task Force Update – 15 February 2019

Last updated on 15 Feb 2019

UIG Task Force Sprint Six Update – 6th December 2018

Last updated on 06 Dec 2018

UIG Task Force Sprint Five Update – 23rd November 2018

Last updated on 23 Nov 2018

UIG Task Force Update to Ofgem – 13th November 2018

Last updated on 13 Nov 2018

UIG Task Force Sprint Four Update - 8th November 2018

Last updated on 08 Nov 2018

UIG Task Force Sprint Three Update – 25th October 2018

Last updated on 25 Oct 2018

UIG Task Force Sprint Two Update - 12th October 2018

Last updated on 12 Oct 2018

UIG Task Force Sprint One Update – 27th September 2018

Last updated on 27 Sep 2018

UIG Update from Ranjit Patel, CCO – 5th September 2018

Last updated on 05 Sep 2018

Issue 2 – WAR Band Analysis as at September 2018

Last updated on 01 Sep 2018

Issue 13 – Simulation of Impact of ALP and DAF Uplift Factors to UIG – 22nd August 2018

Last updated on 22 Aug 2018

XCE1750 UIG Task Force Update – Issues Management Tracker – 16th August 2018

Last updated on 16 Aug 2018

XCE 1742 UIG Task Force – 2nd August 2018

Last updated on 02 Aug 2018

XCE1733 – Update on UIG from Sian Jones CEO – 13th July 2018

Last updated on 13 Jul 2018

Xoserve CEO Update on Unidentified Gas (UIG) – 21st May 2018

Last updated on 21 May 2018

UIG Task Force Findings/Recommendations

The UIG Task Force, working with their external data analytics partner, has completed a detailed analysis of what were thought to be the contributors to Unidentified Gas.

Sprints 1-6 are now complete, and a set of findings has been created to share our workings with customers and industry colleagues. 

You can read our findings and, where appropriate, recommendations below. You can also view our drafted modifications.

Drafted Modifications
Title Drafted Modification
ModXXX Incentivise Key Areas of Performance using Additional UIG Charges Download Drafted Modifications
ModXXX Automatic changes to Meter Read Frequency v0.1 Now Raised As Mod 0692
ModXXX CDSP to convert Class 3 or 4 meter points to Class 1 when G1.6.15 criteria are met Now Raised As Mod 0691
Request XXX Use of a Standard Conversion Factor Now Raised As Request 0693R
ModXXX Reduce qualifying period for Class 1 Now Raised As Mod 0690
ModXXX Amend Must Read Obligation for SSPs Download Drafted Modification
ModXXX Change maximum Meter Read Frequency to 6 months Download Drafted Modification
ModXXX Improving Conversion Factor Quality v0.3
Now raised as Modification 0681

 

Findings and Recommendations
Ref Title Findings Recommendations
1 Use of Estimates for DM sites Our Findings Our Recommendations
2 Title – Low take-up of WAR Band EUCs Our Findings Our Recommendations
3.1 AQ Calculation Errors Our Findings Our Recommendations
3.2.1 Inaccurate/Out-of-date AQs – Non-daily Metered EUC09 sites Our Findings Our Recommendations
3.2.2 Inaccurate/Out-of-date AQs – Sample Sites with different consumption patterns or levels compared with UK Link Our Findings Our Recommendations
3.2.3 Inaccurate /Out of date AQs – Sites that have AQs lower than 100kWh and have had meter read tolerance rejection(s) Our Findings Our Recommendations
3.2.5 Inaccurate / Out of date AQs - impact of AQ . Investigate the change in the AQ mix and direction of travel following introduction of rolling AQ
Our Findings Our Recommendations
3.2.6 Inaccurate/Out-of-date AQs – Different rates of AQ Change to inform discussion on meter read frequency Our Findings No recommendations are required for these findings
3.2.8 Inaccurate/Out-of-date AQs – Sample sites consuming energy with a UK Link AQ of 1 Our Findings Our Recommendations
6 Shippers and Unregistered Sites Our Findings No recommendations are required for these findings
9 DM Nomination Accuracy Our Findings No recommendations are required for these findings

12.1

12.3

Use of Standard Conversion Factor for NDM sites with AQ > 732,000 kWh
Use of Non-Standard Conversion Factor with AQ < 732,000 kWh
Our Findings Our Recommendations
12.2 Use of Standard Conversion Factor with AQ < 732,000 kWh Our Findings Our Recommendations
13.1.1 Accuracy of NDM Algorithm – Uplift Factors Our Findings No recommendations are required for these findings
13.1.2 Accuracy of NDM Algorithm – Weekend vs Weekday Correlation Our Findings No recommendations are required for these findings
13.1.3 Accuracy of NDM Algorithm – Holiday Factors Our Findings No recommendations are required for these findings
13.1.4 Influence of geographical factors on Demand Estimation Our Findings No recommendations are required for these findings
13.2.2 (Including 13.2.3 and 13.2.4) Accuracy of NDM Algorithm – Use of Weather Data – Sensitivity of Components of the Composite Weather Variable Our Findings Our Recommendations
13.2.5 Accuracy of NDM Algorithm – Use of Weather Data – Basic Machine Learning Our Findings Our Recommendations
13.2.6 Accuracy of NDM Algorithm - Advanced Machine Learning Our Findings Recommendations in Development
13.3.1 Accuracy of NDM Algorithm – NDM Sample Data – Representation across EUCs Our Findings No recommendations are required for these findings
13.3.2 Accuracy of NDM Algorithm – NDM Sample Data – NDM Sample Population Our Findings No recommendations are required for these findings
16 Accuracy of Metering Equipment at Meter Point Offtake Our Findings No recommendations are required for these findings
18 Meter Points in "Isolated" status which are registering consumption Our Findings No recommendations are required for these findings

Recommendations Tracker

As well as our own Findings and Recommendations reports, we now have a Recommendations Tracker.

This will be used to monitor all recommendations and progress with our customers.

It is an Excel spreadsheet which is updated at least once a month, and will always be published on the Joint Office website.

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