We have published supporting documents and reports that provide further detail on our final decisions in the 2024 price review.
Company-specific documents
Water and wastewater companies:
Water only companies:
Key documents
PR24 final determinations: Sector summary (republished 20 December 2024)
UK Government priorities and our 2024 price review final determinations
Welsh Government priorities and our 2024 price review final determinations
Welsh translation – Welsh Government priorities and our 2024 price review final determinations
PR24 final determinations: webinar slides
City briefing
Investor briefing documents and presentation
Inbound queries and responses
PR24 final determination inbound query responses
Technical appendices
PR24 final determinations: Our approach (republished 6 February 2025)
PR24 final determinations: In-period adjustments
PR24 final determinations: Quality and ambition assessment summary
PR24 final determinations: Delivering outcomes for customers and the environment (republished 25 July 2025)
PR24 final determinations: Outcomes approach to risk modelling appendix (republished 1 August 2025)
PR24 final determinations: Aligning risk and return
PR24 final determinations: Aligning risk and return – appendix
PR24 final determinations: Aligning risk and return – Allowed return appendix (republished 19 March 2025)
PR24 final determinations: Expenditure allowances (republished 20 December 2024)
PR24 final determinations: Expenditure allowances – Enhancement Cost Modelling appendix
PR24 final determinations: Expenditure allowances – Base cost modelling decision appendix
PR24 final determinations: Expenditure allowances – Thames Water gated allowance appendix
PR24 final determinations: Expenditure allowances – Assurance requirements for delivery of enhancement schemes appendix (Republished 30 January 2025)
PR24 final determinations: Roadmap for enhancing asset health understanding in the water sector
PR24 final determinations: Accounting for past delivery (republished 6 February 2025)
PR24 final determinations: Major projects development and delivery (republished 07 January 2025)
PR24 final determinations: Price control deliverables appendix
Company-specific documents
Affinity Water
Overview of Affinity Water’s PR24 final determination
Notification of the PR24 final determination of price controls for Affinity Water
PR24 final determinations: Affinity Water – Outcomes appendix
Anglian Water
Overview of Anglian Water’s PR24 final determination (republished 10 April 205)
Notification of the PR24 final determination of price controls for Anglian Water
PR24 final determinations: Anglian Water – Outcomes appendix
Dŵr Cymru
Overview of Dŵr Cymru’s PR24 final determination
Welsh translation – Overview of Dŵr Cymru PR24 final determination
Notification of the PR24 final determination of price controls for Dŵr Cymru
PR24 final determinations: Dŵr Cymru – Outcomes appendix
Hafren Dyfrdwy
Overview of Hafren Dyfrdwy’s PR24 final determination
Welsh translation – Overview of Hafren Dyfrdwy PR24 final determination
Notification of the PR24 final determination of price controls for Hafren Dyfrdwy
PR24 final determinations: Hafren Dyfrdwy – Outcomes appendix
Northumbrian Water
Overview of Northumbrian Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Northumbrian Water
PR24 final determinations: Northumbrian Water – Outcomes appendix
Portsmouth Water
Overview of Portsmouth Water’s PR24 final determination
Notification of the PR24 final determination of price controls for Portsmouth Water
PR24 final determinations: Portsmouth Water – Outcomes appendix
SES Water
Overview of SES Water’s PR24 final determination
Notification of the PR24 final determination of price controls for SES Water
PR24 final determinations: SES Water – Outcomes appendix
Severn Trent Water
Overview of Severn Trent Water PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Severn Trent Water
PR24 final determinations: Severn Trent Water – Outcomes appendix
South East Water
Overview of South East Water’s PR24 final determination
Notification of the PR24 final determination of price controls for South East Water
PR24 final determinations: South East Water – Outcomes appendix
South Staffs Water
Overview of South Staffs Water’s PR24 final determination
Notification of the PR24 final determination of price controls for South Staffs Water
PR24 final determinations: South Staffs Water – Outcomes appendix
South West Water
Overview of South West Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for South West Water
PR24 final determinations: South West Water – Outcomes appendix
Southern Water
Overview of Southern Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Southern Water
PR24 final determinations: Southern Water – Outcomes appendix
Thames Water
Overview of Thames Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Thames Water
PR24 final determinations: Thames Water – Outcomes appendix
United Utilities
Overview of United Utilities PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for United Utilities
PR24 final determinations: United Utilities – Outcomes appendix
Wessex Water
Overview of Wessex Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Wessex Water
PR24 final determinations: Wessex Water – Outcomes appendix
Yorkshire Water
Overview of Yorkshire Water’s PR24 final determination (republished 10 April 2025)
Notification of the PR24 final determination of price controls for Yorkshire Water
PR24 final determinations: Yorkshire Water – Outcomes appendix
Supporting documents
Your Water, Your Say survey findings of water companies’ business plans
PR24 final determinations: Glossary
Summary of water companies’ published plans for affordability for 2025-30
Supporting reports
Grant Thornton’s Review of Ofwat PR Modelled Risk of the Outcomes Package
Impact of COVID-19 on Per Capita Consumption
CEPA real price effects and the energy crisis cost adjustment mechanism
Europe Economics Response to Company Representations regarding Frontier Shift for PR24
CEPA PR24 Cost of Equity report
Mason Robertson & Wright, responses to KPMG’s August 2024 Report on Cost of Equity