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Performance Assurance Reports

The reports on this page provide feedback on the results of some of the Performance Assurance Techniques. They feed into the Annual Performance Assurance Report (APAR).

If you want to read previous years’ reports please email us at paa@elexon.co.uk.

Annual Performance Assurance Report (APAR)

The Annual Performance Assurance Report:

  • provides the results of the risk evaluation and risk assurance procedures, in particular how well the techniques mitigated the Settlement Risks;
  • sets out the costs of ELEXON implementing the techniques;
  • recommends changes to existing techniques or recommends creating new techniques; and
  • explains the benefits of changing the Performance Assurance Techniques

Latest report

Previous reports


Performance Assurance Framework Key Performance Indicators

ELEXON will report on the KPIs quarterly, at the same time as the full update on the Performance Assurance Techniques (PATs) is presented to PAB in the TPR. The KPIs will then be published on the Performance Assurance section of the website. The PAB approved the final set of revisions to the KPIs at the April PAB meeting.

PAF_KPIs_Public Quarterly Report


BSC Audit Reports

Annual BSC Audit Report

The BSC Auditor’s annual report and other related documents can be found under Performance Assurance on the BSC Audit page.



Market Issue Documents

Market Issue documents detail matters raised by the Auditor for the industry’s attention. They capture widespread concerns which affect all organisations operating in a certain role.

The following are non-confidential versions of the Market Issues.

BSC Auditor’s Summary of Market Issues


Materiality Report

The BSC Auditor produces a Materiality Report to explain how it determines the materiality of the key issues in the Annual Report. It also covers the distribution of these errors across Settlement. In 2009/10 a number of the key issues previously reported have improved to the extent that they are no longer in the Statement of significant matters. Therefore no Materiality Report was produced. Similarly no reports were produced for the 2010/11 and 2011/12 BSC Audits.


TAA Annual Report – Half Hourly Metering Systems

The Technical Assurance of Metering (TAM) technique monitors compliance of 100kW metering HHMS registered in Settlement as Measurement Class C, as documented in the BSC and its subsidiary documents including the Balancing and Settlement Code Procedures (BSCPs) and metering Codes of Practice (CoPs).

The Technical Assurance Agent (TAA) Annual Report provides the TAA’s view on the health of the Half Hourly metering population in the SVA and CVA markets. It is based on the findings from the inspections of Technical Assurance of Metering Systems and is used to highlight key market issues, particularly those with high potential materiality or risk to the quality of data used in Settlement.

If you have had more than 25 TAA inspections during the 2015/16 audit period, you will receive your individual annual customer reports, and will also be offered a chance to discuss your individual findings with ELEXON and the TAA.

We also produce individual confidential reports for Registrants (of Metering Systems) and Meter Operator Agents who receive 25 or more visits during the year.


TAA Annual Report



Technical Assurance of Performance Assurance Parties Reports

After some types of Technical Assurance (TA) check we produce a non-confidential outcome report that is presented to the PAB. Here are the outcome reports from recent TA checks.

Annual Report – Period ending June 2007 [42 Kb]


Technical Assurance Check: Meter Technical Details Outcome Report [4390 Kb]


Technical Assurance Report: Maintaining and Managing Metering System Records [364 Kb]


Technical Assurance Check – Investigating the Trading Disputes Process Findings Report [412Kb]


Technical Assurance Report: Processing Revenue Protection Reads [838 Kb]


Technical Assurance Report: Supplier Appointments and Associated notifications [838 Kb]


Technical Assurance Check: Fault Investigation Process [484 Kb]


Technical Assurance Check: P283 Commissioning Process Implementation