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Guidance to SVA (Supplier Volume Allocation) Transfer of Auxiliary Data
This page provides guidance to Half Hourly customers, Suppliers and
Supplier Agents on best practice in the transferring of auxiliary data on
Change of Supplier and Change of Agent events.
‘Auxiliary data’ refers to information about Metering System site access that is
not formally recorded on Supplier and Supplier Agent systems. Auxiliary data
can be useful for gaining entry to ‘difficult to access’ sites; those sites
that are physically difficult to access or that may require further
instruction/action so that meter readers can obtain reads.
The ‘best practice’ is contained in a Guidance Document and two forms to use on
Change of Supplier and/or Change of Agent events. These forms should be shared
between Agent or Customer and should not be sent to ELEXON as part of the
process. To download the Guidance Document in PDF format and the pro formas in
Word format refer to the table below.
The guidance is provided as ‘best practice’. While the documents in this section
have been agreed by industry members as sensible practices that may reduce
error and enhance the possibility of performance improvements, they should not
be used as procedures which instigate processes.
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SVA Transfer of Auxiliary Data Discussion Groups
The need for guidance and standardised procedures was identified during industry
discussion groups hosted by ELEXON. The discussion groups advised that
standardised procedures would help facilitate the transfer of auxiliary data
between sites classified as difficult to access.
The initial motivation of the groups was to consider problems in achieving the
97 per cent Performance Level for Non Half Hourly (NHH) energy settled on
Annualised Advances (Serial SP08a), caused by difficult-to-access sites. The
groups also considered the transfer of data relating to site access (termed by
the group ‘Auxiliary Data’) between SVA participants, and they agreed how to
progress solutions to site access and data transfer issues.
The groups reported that the problems involve Suppliers, Supplier Agents and
Gemserv. They highlighted overlap between the work of the Customer Transfer
Programme and the Transfer of Auxiliary Data Groups, so it was deemed
appropriate to involve the Customer Transfer Programme.
The discussion groups consisted of a Steering Group (of fixed composition) and
an Expert Group (of varying composition as directed by the Steering Group). The
following participants were represented:
- Suppliers
- Supplier Agents
- Gemserv
- The Customer Transfer Programme
- ELEXON
The findings of the Steering Group and Expert Group were reported to the
Supplier Volume Allocation Group (SVG). The outputs of the Groups
consisted of the SVA Transfer of Auxiliary Data Guidance Document, two Data
Transfer Pro-Formas, and six proposed amendments to the Master Registration
Agreement (MRA). Additionally, the SVG recommended that the issues surrounding
long-term vacant sites should be considered by the Volume Allocation Standing
Modification Group (VASMG). This matter was raised for consideration as
Issue 14.
To download the Terms of Reference for the Steering and the Expert Group in PDF
format, refer to the table below.
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