Our Annual Performance Report contains information that allows customers and stakeholders to review our performance and to make comparisons with other companies in the sector.
It also provides specific information on the progress we have made on the delivery of customer outcomes and service levels and on our financial performance (including detailed revenue and cost information).
We are required to publish a single Annual Performance Report in a format prescribed by Ofwat.
2021-2022
Annual Performance Report 2021-2022 Part 1
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662.3kB, PDF
Annual Performance Report 2021-2022 Part 1 v2 1 August 2022
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815.2kB, PDF
Annual Performance Report 2021-2022 Part 2
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650.9kB, PDF
Annual Performance Report 2021-2022 Part 3
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2MB, PDF
Annual Performance Report - 2021-2022 Parts 4 to 11
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3MB, PDF
Data Assurance Summary 2021-2022
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338.8kB, PDF
Accounting Methodology Statement
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985.1kB, PDF
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3
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1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v2 29 July 2022
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1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v3 1 August 2022
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1.6MB, XLSX
Annual Performance Report 2021-22 Tables Parts 1 to 11 excluding part 3 v4 21 September 2022
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1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Parts 1 to 11 excluding part 3 v5 22 September 2022
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1.6MB, XLSX
Annual Performance Report 2021-2022 Tables Part 3
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1.7MB, XLSX
In-Period ODI Submission 2021-22
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315.8kB, PDF
In-Period Adjustments Model - 2022
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345.6kB, XLSX
2021_22 Commentary Carbon Footprint
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162.9kB, PDF
WSH Water catchments improved PCWt7 AnnualReport 2022
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335.7kB, PDF
2020-2021
Annual Performance Report 2020-2021 Overview
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768.7kB, PDF
Annual Performance Report 2021 - Part 1 Addendum IF
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198.4kB, PDF
Annual Performance Report 2020-2021 Part 1
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758.7kB, PDF
Annual Performance Report 2020-2021 Part 2
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639.3kB, PDF
Annual Performance Report 2020-2021 Part 3
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2MB, PDF
Annual Performance Report - 2020-2021 Parts 4 to 9 - v2
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2.9MB, PDF
Data Assurance Summary 2020-2021
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609.7kB, PDF
Accounting-Methodology-Statement-2020-2021
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1MB, PDF
Annual Performance Report 2020-2021 Tables Parts 1 to 9 excluding part 3 v2
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1.7MB, XLSX
Annual Performance Report 2020-2021 Tables Part 3
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1.7MB, XLSX
In-Period ODI Submission 2020-21 WSH
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446.3kB, PDF
2020-21 In-Period Draft Determination Response WSH
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208.1kB, PDF
PR19 In-Period Adjustments Model - March 2021 v14 WSH
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301.4kB, XLSX
2019-2020
Annual Performance Report 2020-2021 Overview
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768.7kB, PDF
Annual Performance Report 2019-2020 Part 1
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736.6kB, PDF
Annual Performance Report 2019-2020 Part 2
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506.1kB, PDF
Annual Performance Report 2019-2020 Part 3
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3.5MB, PDF
Annual Performance Report 2019-2020 Part 4
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2.6MB, PDF
Risk and Compliance Statement - APR Part 5
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471.6kB, PDF
Data Assurance Summary
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821.4kB, PDF
PR19 Blind Year Submission July 2020
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1MB, PDF
Accounting Separation and Methodology Statement 2019-2020
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1MB, PDF
2018-2019
Annual Performance Report 2018-19 Overview
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1.2MB, PDF
Annual Performance Report 2018-19 Part 1
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943.2kB, PDF
Annual Performance Report 2018-19 Part 2
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889.9kB, PDF
Annual Performance Report 2018-19 Part 3
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3.5MB, PDF
Annual Performance Report 2018-19 Part 4
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4.2MB, PDF
Risk and Compliance Statement APR 2018-19 Part 5
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332.5kB, PDF
PR14 Reconciliation Rulebook 2018-2019
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1.2MB, PDF
Accounting Separation Methodology Statement 2018-19
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2.2MB, PDF
2017-2018
Annual Performance Report 2017-2018 Overview
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1.6MB, PDF
Annual Performance Report 2017-2018 Part 1
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847.3kB, PDF
Annual Performance Report 2017-2018 Part 2
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760.7kB, PDF
Annual Performance Report 2017-2018 Part 3
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3.7MB, PDF
Annual Performance Report 2017-2018 Part 4
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3.4MB, PDF
Annual Performance Report 2017-2018 Part 5 - Risk and Compliance
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524.7kB, PDF
Annual Performance Report 2017-2018 Data Assurance Summary
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1.1MB, PDF
Accounting Separation Methodology Statement 2017-2018
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1.3MB, PDF