During the 2019 price review (PR19) we set specific performance commitments for water companies to deliver for their customers, the environment and wider society. These measures represent the levels of service that companies commit to deliver and are linked to corresponding incentives to achieve these levels of performance over the 2020-25 period (from 1 April 2020 to 31 March 2025).
When making the PR19 final determinations, we provided for changes and corrections to be made to performance commitments during the 2020-25 period in the prescribed circumstances set out in Annex 2 of each company’s ‘Outcomes performance commitment appendix’. In summary, these circumstances are:
- the correction of unambiguous errors;
- relevant changes to third–party materials in performance commitment definitions;
- improvements to performance commitment definitions that are in customers’ interests; and
- bespoke adjustments in prescribed circumstances set out in individual performance commitments.
Annex 2 specifies the procedures we expect companies to follow if a change or correction is proposed. We document unambiguous errors by issuing corrigenda. Other changes are recorded in the relevant company’s change log. In the tables below, we set out all such corrigenda and the change logs for each company, as well as corresponding consultations and decision documents.
We also link to each company’s ‘Outcome performance commitment appendix’ as published at the December 2019 final determinations and will shortly provide a consolidated version that we will update from time to time with the changes and corrections that we make. For the full definitions of common and some comparable performance commitments, see the outcomes definitions for PR19.
Agreed corrections and changes to performance commitment definitions
List of consultations and decisions
Table A – Open consultations of potential changes to performance commitment definitions
| Reason for consultation | Short summary of change | Performance commitments affected | Consultation document(s) | Respond by |
Table B – Consultations that resulted in changes to performance commitment definitions
| Reason for consultation | Short summary of change | Effective date of change | Performance commitments affected | Consultation document(s) | Decision document(s) |
| Bespoke change process
|
Changing D-MeX to reflect new metrics relating to the services provided by water companies to self-lay providers (SLPs) and the adoption of water assets. | 1 April 2021 | D-MeX (all companies) | Consultation on changing the self-lay water metrics in D-MeX – Ofwat | Changing the Water UK metrics in D-MeX – our final decisions – Ofwat |
| Bespoke change process | Changing D-MeX to reflect new metrics relating to the services provided to NAVs and the adoption of sewerage assets | 1 October 2020 | D-MeX (all companies) | Consultation on changing the Water UK metrics in D-MeX | Changing the Water UK metrics in D-MeX – our decisions |
| Update to third party reference | Changes to the version of the references to the Environmental Performance Assessment methodology in the sewage treatment works compliance and pollution incidents common performance commitments for performance commitment reporting and ODI calculation from 2021-22 (year 2) | 1 April 2021 | Pollution incidents (all companies providing wastewater services)
Treatment works compliance (all companies providing wastewater services) |
Consultation on changes to the Environmental Performance Assessment Methodology referenced in two PR19 common performance commitments | Changes to the Environmental Performance Assessment Methodology referenced in two PR19 common performance commitments – our decision on performance commitment reporting and ODI calculation from 2021-22 (year 2) onwards |
| Bespoke change process | We proposed changes to the timing of financial adjustments for performance against the per capita consumption performance commitments and the considerations we propose to apply when determining their value. | 1 April 2021 | Per capita consumption (PCC) (all companies except South West Water) | Consultation on changes to per capita consumption performance commitments | Consultation on changes to per capita consumption performance commitments – our decision on reporting performance and ODI timing |
| Changes to third party materials referenced in performance commitments | Change the reference from Issue 4 to Issue 5 of the BAS standard for the three affected companies | 1 January 2021
1 April 2021
(applicable as per performance measurement timing for affected companies) |
Performance commitments concerning the treatment of sewage sludge to a standard before recycling it as a quality agricultural product or biosolids | Notice of intention to change: PR19 Outcome performance commitment appendices – Reference in biosolids performance commitment definitions | We received no objections with regards to our notice of intention to change this reference. One of the affected companies requested we align changes with its specific ‘frequency of reporting’ which is on a calendar year basis; we agreed. |
| Bespoke change process | Change to the PC definition following an intermediate connecting sewer to an expected development no longer required | 1 April 2022 | North Bristol Sewer Scheme – Trym catchment | Notice of intention to change: PR19 Outcome performance commitment appendix –Reference to a connecting sewer
|
We received no objections with regards to our notice of intention to apply this change. The change has been applied to Wessex Water’s outcome appendix as noted above in the Change log. |
| Bespoke change process – Third party material | Change to the PC definition following a named survey company exited the market and replaced by a new company
|
3 March 2022 | Employee engagement
|
Notice of intention to change: PR19 Outcome performance commitment appendix – Reference to a company undertaking survey for the performance commitment
|
We received no objections with regards to our notice of intention to apply this change. The change has been applied to Welsh Water’s outcome appendix as noted above in the Change log. |
| Bespoke change process – Third party material | Changes to the Carbon Accounting Workbook version referred to in 2020-25 performance commitments | 01 April 2021 | PR19ANH_24
PR19NES_BES21 PR19YKY_6a |
Consultation – Changes to the CAW version reference in 2020-25 PCs – Ofwat | Response-–-Changes-to-the-CAW-version-reference-in-2020-25-PCs |
Table C – Consultations that did not result in changes to performance commitments definitions
| Reason for consultation | Short summary of proposed change | Performance commitments affected | Consultation document(s) | Decision document(s) | |
| Update to third party reference | References to the Environmental Performance Assessment methodology in the sewage treatment works compliance and pollution incidents common performance commitments should remain as relating to version 3 for 2020-21 (year 1) performance commitment reporting and ODI calculation | Pollution incidents (all companies providing wastewater services)
Treatment works compliance (all companies providing wastewater services) |
Consultation on changes to the Environmental Performance Assessment Methodology referenced in two PR19 common performance commitments | Changes to the Environmental Performance Assessment Methodology referenced in two PR19 common performance commitments – our decision on 2020-21 (year 1) performance commitment reporting and ODI calculation |