As the Central Data Service Provider for the gas industry, Xoserve maintains and manages the central database. The database holds all of Great Britain’s gas consumption points (‘Supply Points’) and provides a forecast of each system user’s gas demand for the current and following day, while also performing the allocation of the total actual system usage after the day across all users. Gas forecasting and allocation are done at an aggregated level, grouping sites by geography and size of their typical annual usage.
On 1st June 2017, Xoserve implemented a new suite of systems as part of its UK Link Programme. These changes included the introduction of a new supply point register and made changes to the gas allocation systems. These new systems brought into effect a number of major ‘rule’ changes, which had been designed by gas industry parties over several years. These changes were intended to make daily gas allocation fairer and more transparent.
One of the key changes introduced was a new daily concept of ‘Unidentified Gas’ – an amount of gas which could not be attributed directly to any system user. As only a minority of supply points (less than 20% of annual usage and fewer than 1,000 sites) submit daily reads into the allocation process, the remainder of gas is allocated based on estimates and historic profiles based on sample data.
In its role at the centre of the gas industry, Xoserve has been trying to support its customers to understand and manage Unidentified Gas further. In addition, Xoserve is looking to increase its analytical capability, and use more advanced technology with a number of aims:
- Develop a better understanding of the drivers of daily Unidentified Gas
- Develop a model which can explain historic daily levels and fluctuations, and predict future movements at a daily and regional level
- Undertake a radical review of the forecasting/allocation model used for the Non-Daily Metered sites to identify whether any significant improvements could be made, which would in turn reduce/mitigate Unidentified Gas levels and variation
- Undertake analysis of the predicted versus the actual consumed energy as a way of validating the models currently used for forecasting and allocation
- Develop projections of the time required for all meters to be read, and the amount of actual energy as yet unrecorded, to give a view of the eventual level of Unidentified Gas after all settlement processes have taken place
- Identify any particular sites that have significant variances between allocation and consumption on a continuing basis
We will keep customers updated on this important issue via this page.
Title Last Updated Format UIG Resolution – Weekly Update 13th July 2018
UIG Resolution – Weekly Update Archive
Title Last Updated Format XCE1733 – Update on UIG from Sian Jones CEO 13th July 2018 Xoserve CEO Update on Unidentified Gas (UIG) 21st May 2018 Xoserve CEO UIG Event Update November 2017 28th November 2017 Xoserve CEO UIG Update Nov 2017 20th November 2017 XCE1650 – UNC Modification 0634 Daily Metered Supply Meter Points 20th November 2017 XCE1643 UIG Important Information regarding DM Sites 6th October 2017 XCE1625 Sian Jones CEO provides a further update on UIG 7th September 2017 XCE1607 Andy Malins National Grid provides a further update on UIG – Issued on behalf of National Grid 4th August 2017 XCE1599 Sian Jones CEO provides a further update on UIG 1st August 2017 XCE1588 Sian Jones CEO provides an update on UIG 5th July 2017 XCE1584 Unidentified Gas (UIG) 30th June 2017
Solution Options Meeting 22nd November 2017
Title Date File Type Solution Options Meeting Overview 22nd November 2017 SWOT Analysis 22nd November 2017
Solution Options Meeting 13th November 2017
Title Date File Type Solution Options Meeting 13th November 2017 Unidentified Gas and NDM Allocation Proposal
This information has been provided by E.ON
13th November 2017 Unidentified Gas (UIG) Solutions Workgroup – Output 13th November 2017
Awareness, Causes and Mitigations 20th October 2017
Title Date File Type Awareness, Causes and Mitigations 20th October 2017
For more information regarding this UNC request please click here
Daily calls – 10:00am
The purpose of these calls are to review progress against actions agreed at the working group.
To join this meeting please use the details below:
Birmingham 0121 210 9185
Glasgow 0141 202 0815
Leeds 0113 301 0015
London 020 7950 1251
Manchester 0161 601 3094Participant Access Code – 76451578#
Action Log Date File Type
Title Date File Type
Title Date File Type WAR Band EUCs – Briefing Pack 22nd December 2017 Reconciliation Report by month 13th July 2018 XLSX DM Read Rejections for Class 1 Sites 6th February 2018 Title Date File Type Amendment Invoice Validation 21st November 2017
The report shows the primary reconciliation processed within a Billing Month, against the original Supply Month. Equal and opposite values are processed as UIG reconciliation
AUGE (Allocation of Unidentified Gas Expert) Statement for 2017/18
Unidentified Gas Weighting Factors for Gas Year 2017/18
Link to Joint Office page for 2017/18 AUG (Allocation of Unidentified Gas) matters