pr19 business plan data tables

PR19 models and data tables

Yorkshire water.

These are the models and data tables submitted to the regulator Ofwat to support Yorkshire Water's PR19 business plan submission for 2020 to 2025.

• Our Purpose
• Our responsibilities and plans

Business Plan 2025-30 Technical Reports and Appendices

Our business plan includes the following documents:.

• Main Business Plan (NES01), which explains our plans in summary. We’ve kept it short to help readers understand a summary of our plans without unnecessary detail.
• Long-term strategy (NES_LTDS), including annexes and models to explain our approach.
• A series of eight appendices (NES02 to NES09), which describe our plans and how we have met the methodology requirements, in more detail in each area. This includes providing the evidence required to meet Ofwat’s Quality and Ambition Assessment tests. We have written these to support people working in Ofwat on these particular topics in understanding our Business Plan and how we have tested and scrutinised this.
• A series of enhancement cases, which explain in more detail how we have made our decisions about the enhancement investments that we will make in 2025-30. This includes providing the evidence Ofwat asks for in their PR24 methodology. We have carried out benchmarking for these cases, and we provide a detailed cost benchmarking report, NES 66 (not to be published).
• Our customer research insight summaries which, along with our line-of-sight report (NES45), provide the evidence from our customer engagement. We published all of our individual research reports in our research library over the last year, and have included our qualitative and quantitative affordability and acceptability research reports in full with this submission (NES49 and NES50).
• Supporting evidence for our appendices. This includes independent reports and assessments, including for example: our full assessment of DPC suitability; our work on assessing deliverability; our work on climate change resilience and managing extreme weather risks; and our evidence on the cost of capital.
• Assurance and challenge reports, including the independent challenge report from Water Forum (NES47) and the assurance and challenge from our providers.
• Data tables, models, and data table commentaries. We have included all the models and data tables required, as well as commentaries for each block of tables.

Update as of 25 January 2024

Since submission of our PR24 Business Plan to Ofwat in October 2023, we have made changes to parts of that plan.

These have been in response to requests from Ofwat or other regulators and a small number of corrections in the detail of the submission, in some cases in response to clarifications issued after we published the plan.

Downloadable content

Business plan and appendices, supporting evidence, long term delivery strategy, data tables and models.

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Our business plan

The next five years (2025 - 2030).

We're proud to present our business plan for 2025–2030. What our customers want shapes what we do, and our business plan focuses on the next five years of that journey. It reflects new requirements from our regulators and the feedback we’ve had from our customers and our stakeholders. It’s helped drive the pace and scope of our plan and our long-term ambitions.

What is our purpose?

We’re focused on building our resilience and providing a long-term sustainable supply of high-quality water, while protecting our environment for our communities – now and in the future.

What is our aim?

Our aim is to provide efficient and affordable services, both now and in the long term.

Our long-term ambitions

These are focused on four key areas:

• The Environment 
• Our customers
• Our communities

Read our plan and supporting evidence below. Take a look at how we've engaged customers with our plans and what they told us.

Our business plan 2025 - 2030

Draft Determination Representation

Latest information on our PR24 business plan

Since the submission of our Representations to Ofwat in August 2024, we've made changes to parts of our plan in response to requests from Ofwat or other regulators, please find below updated data tables published on 20 September 2024.

Updated Data tables

AFW107 - Additional data tables ADD - updated 20 September 2024

AFW106 - Additional data tables ADD22-23 - updated 20 September 2024

AFW105 - Data tables - updated 20 September 2024

Following the publication of Ofwat’s draft Determination on 11th July 2024, we have submitted our response.

You can find a guide to our Representations along with the Representation document and appendices below.

Representation

• AFW100 - Guide to our Representation
• AFW101 - Affinity Water PR24 Draft Determination Representation
• AFW102 - Review of Ofwat's smart metering assessment at PR24
• AFW103 - Connect 2050 supply interconnector modelling critique
• AFW108 - KPMG- Cost of embedded debt
• AFW109 - KPMG- Cost of new debt
• AFW110 - Economic insight impact of asset growth on systematic risk
• AFW111 - Economic Insight - Frontier shift report
• AFW112 - PFAS business case
• AFW113 - Water UK on treatment of energy costs in AMP8
• AFW114 - Representation proforma
• AFW134 - KPMG- Assurance of financial data tables, reconciliation models and financial model
• AFW135 - Uncertainty mechanism for PFAS (Notified item)
• AFW136 - Formal response to Dividend lock up after 70% gearing
• AFW137 - Formal response to Proposed licence modifications to Condition B: Charges
• AFW138 - Atkins - Data tables assurance
• AFW139 - Assurance of enhancement costs and 3rd party benchmarking
• AFW140 - Outline cases for support of the £8m allowance for climate change adaption
• AFW141 - Cyber security - Redacted
• AFW142 - Water UK investability study
• AFW143 - Centrus report
• AFW146 - Connect 2050 explainer
• AFW147 - Embedded emissions PC template /Bespoke Performance Commitment Definitions
• AFW149 - Economic Insight- Full RoRE method write up
• AFW150 - Security sensitive maps - Redacted
• AFW152 - KPMG- Cost of Equity
• AFW153 - Commercially sensitive information - Redacted
• AFW154 - Smart Metering PCD Working Group report

Data tables & commentary

• AFW104 - Data tables Commentaries
• AFW105 - Data tables V7 August
• AFW106 - Additional data tables ADD
• AFW107 - Additional data tables ADD22-23
• AFW121 - Data tables summary

Financial models

• AFW115 - Revenue forecasting incentive (RFI)
• AFW116 - Outcome delivery incentive (ODI) performance 2024-25
• AFW117 - Residential retail reconciliation
• AFW118 - Developer services revenue adjustment mechanism
• AFW119 - Water industry national environment programme (WINEP) reconciliation
• AFW120 - Outcome delivery incentive (ODI) performance 2023-24
• AFW122 - Cost sharing reconciliations
• AFW124 - Land Sales
• AFW125 - RPI-CPIH Wedge true up model
• AFW126 - Strategic regional water resources reconciliation
• AFW127 - RCV Adjustments model
• AFW128 - Revenue adjustments model
• AFW130 - Ofwat PR24 Financial model with our representation case
• AFW131 - Ofwat PR24 Financial model to data table mapping tool to accompany the tables and model
• AFW132 - Ofwat PR24 Bill waterfall model updated for our representation case
• AFW133a - Ofwat PR24 RoRE model draft Determination
• AFW133b - Ofwat PR24 RoRE model our Representation case

Post submission publications

Since the submission of our PR24 business plan to Ofwat in October 2023, we have made changes to parts of our plan. These have been in response to requests from Ofwat or other regulators and to clarify some points in our original plan. The result of these changes to date is that Ofwat are now considering a PR24 business plan for Affinity Water that includes total expenditure of £2,127 million (up from £2,124 million in our October 2023 plan) and average annual customer bills of £217 by 2030, the same as in our October 2023 plan. Ofwat's draft determinations will be based on this expenditure and these bills.

The reason for the change to our total expenditure for PR24 and associated average annual customer bills is as a result of minor changes to align our WRMP and business plan and to correct a small number of inaccuracies. 

Calculation of PR24 business plan costs for publication - March 2024

PR24 - Part 1 Commentary - Outcomes (post submission 16-11-23)

PR24 - Part 3 Commentary - Costs (wholesale) water (post submission 16-11-23)

AFW - PR24 BP Tables V6 - Post submission update 25 January 2024

AFW - PR24 BP Tables V6 - Post submission update 8 February 2024

WINEP Reconciliation Model

Residential Retail Reconciliation Model

Our long term plan 2025 - 2050 (PDF 8.16MB)

PR24 Business Plan

• AFW00 - Guide to our plan
• AFW01 - Affinity Water PR24 Business Plan
• AFW39 - Customer version of the plan
• AFW51 - Affinity Water Long-Term Delivery Strategy
• AFW62 - Q&A signposting form
• AFW02 - Past performance
• AFW03 - Strategic Direction Statement
• AFW04 - What customers and stakeholders want
• AFW05 - 'What customers and stakeholders want' methodology
• AFW06 - Developer experience
• AFW07 - Update on our resilience action plan
• AFW08 - Our investment development process
• AFW09 - Atkins assurance letter
• AFW10 - Accelerated Infrastructure Projects (AIP)
• AFW11 - Water UK Report and set of forecasts by Cornwall Insight
• AFW13 - Base investments
• AFW14a - Enhancement investment cases
• AFW14b - Enhancement investment cases
• AFW15 - Green finance framework
• AFW16 - Treatment of energy costs in base models (KMPG)
• AFW17 - Outcomes
• AFW18 - Bespoke performance commitments
• AFW19 - Price control deliverables
• AFW20 - RORE risk ranges - Economic Insights
• AFW21 - Financeability considerations
• AFW22 - Risk and Return cost of equity (KPMG)
• AFW23 - Inference analysis (KPMG)
• AFW24 - Record of board meetings
• AFW25 - Real price effects retail (KPMG)
• AFW26 - KPMG assurance letter
• AFW28 - PwC assurance letter
• AFW32 - Deliverability of our plans
• AFW34 - WISER report
• AFW36 - Independent Challenge Group report
• AFW37 - Dividend policy
• AFW38 - Remuneration policy
• AFW40 - Direct Procurement for Customers
• AFW41 - Case studies
• AFW42 - Cost adjustment claim - regional wages
• AFW43 - Cost adjustment claim - Transience - Economic Insight
• AFW45 - Affordability and acceptability research results (accent)
• AFW46 - First economics - PR24: Input price inflation
• AFW47 - Alternative WACC
• AFW48 - Centrus report

Data tables commentary

• AFW52 - PR24 - Part 1 Commentary - Outcomes
• AFW53 - PR24 - Part 2 Commentary - Risk & return
• AFW54 - PR24 - Part 3 Commentary - Costs (wholesale) water
• AFW55 - PR24 - Part 5 Commentary - Water resources
• AFW56 - PR24 - Part 7 Commentary - Retail
• AFW57 - PR24 - Part 8 Commentary - Developer services
• AFW58 - PR24 - Part 9 Commentary - Long term strategies
• AFW59 - PR24 - Part 10 Commentary - Supplementary tables
• AFW60 - PR24 - Part 12 Commentary - Past delivery
• AFW61 - Additional information request Energy Commentary
• AFW85 - PR24 - Part 11 Commentary - Summary tables

Data tables

• AFW63 - Additional information request - energy costs
• AFW82 - Affinity Water PR24 data tables
• AFW35 - Bill calculations model (Long-Term Delivery Strategies bill projection)
• AFW64 - Ofwat financial model
• AFW65 - Waterfall model
• AFW66 - RORE model
• AFW67 - Revenue forecasting incentive (RFI)
• AFW68 - Part 1 of 2: Outcome delivery incentive (ODI) performance 2023-24
• AFW68 - Part 2 of 2: Outcome delivery incentive (ODI) performance 2023-24
• AFW69 - Residential retail reconciliation
• AFW70 - PR19 Water trading incentive
• AFW71 - Developer services revenue adjustment mechanism
• AFW72 - Water industry national environment programme (WINEP) reconciliation
• AFW73 - Cost of new debt reconciliation
• AFW74 - Gearing outperformance sharing mechanism
• AFW75 - Cost reconciliations
• AFW76 - Part 1 of 3: Tax Reconciliation
• AFW76 - Part 2 of 3: Tax Reconciliation
• AFW76 - Part 3 of 3: Tax Reconciliation
• AFW77 - Land Sales
• AFW78 - RPI-CPIH Wedge true up model
• AFW79 - Part 1 of 6: Strategic regional water resources reconciliation
• AFW79 - Part 2 of 6: Strategic regional water resources reconciliation
• AFW79 - Part 3 of 6: Strategic regional water resources reconciliation
• AFW79 - Part 4 of 6: Strategic regional water resources reconciliation
• AFW79 - Part 5 of 6: Strategic regional water resources reconciliation
• AFW79 - Part 6 of 6: Strategic regional water resources reconciliation
• AFW80 - RCV Adjustments model
• AFW81 - Revenue adjustments model
• AFW84 - Financial mapping tool

Our business plan 2020 - 2025

• AMP7 Enhancement Expenditure Action Plan (PDF 1.1MB) >
• Board Assurance Statement (PDF 763KB) >
• Draft Determination - Company Response (PDF 1.5MB) >
• Ofwat - Representation Pro-Forma (PDF 54KB) >
• Company response - Delivering outcomes for customers (PDF 3.17 MB) >
• Appendix A (Drought severe restrictions risk calculations) (PDF 126KB) >
• Appendix B (Drought certainty grade calculations) (PDF 127KB) >
• Company response - Cost efficiency (PDF 2MB) >
• Appendix D (Joint Statement) (PDF 734KB) >
• Appendix E (Letter AW to DWI) (PDF 484KB) >
• Appendix F (Guidance to Water Companies Metaldehyde) (PDF 201KB) >
• Appendix G (Metaldehyde and Pesticides Parameters) (PDF 159KB) >
• Company response - Financing and resilience (PDF 1MB) >
• Appendix A (Dividend Policy) (PDF 1.7MB) >
• Appendix B (Executive Pay) (PDF 1.7MB) >
• Appendix C (Verve Bill Profile customer Research) (PDF 2.6MB) >
• Appendix D (Experian Report for Affinity Water Phase 2) (PDF 1.25MB) >
• Appendix F (PAYG and RCV Run off) (PDF 848MB) >
• Data Tables >
• Developer Services Information Request >
• Outcomes Information Request >
• PR19 Split by Opex and Capex >
• Financial Data Tables Assurance Letter (PDF 320KB) >
• Technical Data Tables Assurance Report (PDF 688KB) >
• Data Tables Commentary (PDF 706KB) >
• Financial Model Actual >
• Financial Model Notional >
• Revenue Adjustments Feeder Model >
• WRFIM Feeder Model >
• Mapping Tool >

Revised Business Plan for 2020 to 2025

After our Business Plan for 2020 to 2025 was submitted to Ofwat in September 2018 after a review from Ofwat we received feedback from them in January 2019. We have carefully listened to Ofwat’s feedback and improved our September plan in a range of specific areas to deliver even more for our customers and communities.

We are going to do more for less, by:

• Reducing the average household bill. We now plan to reduce our average bill by 1.6% in real terms by 2025 compared to an increase of 2.1% in our September Plan;
• Stretching ourselves further through our commitments, including on leakage where we have increased our reduction target from 15% to 18.5% (equivalent to 30 Ml/d);
• Adding additional commitments that are dedicated to supporting customers in vulnerable circumstances, and those who will benefit from our Priority Services Register.

All the detail is included in our Revised Plan below.

• Revised Plan Executive Summary >
• Revised Plan Supplemental Board Assurance Statement >
• Revised Plan Guidance Note >
• Action Tracker >
• Customer Challenge Group Report >
• Engaging Customers Evidence Document >
• Engaging Customers Appendices >
• Addressing Vulnerability & Affordability Evidence Document >
• Addressing Vulnerability & Affordability Appendices >
• Delivering Outcomes for Customers Evidence Document >
• Delivering Outcomes for Customers Appendices >
• Securing Long Term Resilience Evidence Document >
• Securing Long Term Resilience Appendices >
• Targeted Controls, Markets and Innovation Evidence Document >
• Targeted Controls, Markets and Innovation Appendices >
• Securing Cost Efficiency Evidence Document >
• Securing Cost Efficiency Appendices >
• Aligning Risk and Return Evidence Document >
• Aligning Risk and Return Appendices >
• Accounting for Past Delivery Evidence Document >
• Accounting for Past Delivery Appendices >
• Securing Confidence and Assurance Evidence Document >
• Securing Confidence and Assurance Appendices >
• Data Tables (Tables APP21 and WR7 fully redacted as they are commercially sensitive) >
• Data Table Commentary >

Business plan for 2020 to 2025

Our Business Plan 2020 to 2025 (PDF 20.7MB) Our Business Plan 2020 to 2025 Executive Summary (PDF 1.1MB) Our Business Plan 2020 to 2025 Board Assurance Statement (PDF 1.8MB)

Ofwat pro forma

Business Plan Presentation Pro-forma (PDF 3.4MB) Business Plan Presentation Guidance Tables (XLSX 127KB) Bill Waterfall Model (XLSM 321KB)

Financial model

Affinity Water Ofwat Financial Model (XLSB 8.8MB)

PR19 data tables

PR19 Data Tables (XLSB 5.1MB) PR19 Data Table Commentaries (PDF 3.6MB)

Appendix 1 - Business Plan Glossary (PDF 390KB) Appendix A - Guidance Note (PDF 642KB) Appendix B - WISER Report (PDF 829KB) Appendix 2 - Our Track Record (PDF 1.7MB) Appendix 3 – Listening to Customers and Stakeholders (PDF 44.3MB) Appendix 4 – Our Outcomes and Performance Commitments (PDF 9.7MB) Appendix 5 – Trading Procurement Code and Bid Assessment Framework (PDF 1.6MB) Appendix 6 – Wholesale Technical Support Document (PDF 14.5MB) Appendix 7 – Delivering Great Customer Service (PDF 3MB) Appendix 8 – Our Community Approach (PDF 1.8MB) Appendix 9 – Ensuring Long Term Resilience (PDF 5.5MB) Appendix 10 – Ensuring Affordability and Financeability (PDF 11.3MB) Appendix 11 – Governance and Assurance (PDF 4.7MB)

Our business plan 2015 - 2020

Business plan for 2015 to 2020

Business Plan (PDF 3MB) Business Plan Consultation (PDF 1.2MB) Business Plan Summary Brochure (PDF 1.2MB) Draft Determinations (PDF 209KB) CSG Response to OFWAT (PDF 63KB) Recalibrated Incentives and Board Assurance Statement Risk and Reward submission (PDF 3.1MB)

• Help & Support

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We provide a range of commercial services across our region. You can learn more and enquire about them here.

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Trade effluent is any liquid waste discharged into our sewers from a business or industrial process on a trade premises.

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We want your experience with us to be simple and straightforward. Here you'll be able to find useful information and links for water retailers.

Trade effluent is any liquid waste (effluent) discharged into our sewers from a business or industrial process.

Every year the population of the South East grows, but the amount of available water remains the same. Learn what your business can do to save water.

Here you can find all relevant documents for wholesale charges and the timetable of settlement dates.

Useful Retailer Links

Here you'll find all the latest information on what's happening in our region including our current Pathfinder projects.

Here you can view our latest environmental reporting on bathing water quality, flow and spill compliance and pollutions.

Here you can view our investment plans for 2020-2025. These will help us to improve and protect our region's water environment.

Here you can access our latest water level figures from our main sources - groundwater, rivers and reservoirs.

Here you can learn more about our water treatment process.

Useful Region Links

Here you can learn more about us and our ambitions and the people, organisations and policies that underpin our business.

Here you can view or download both the latest and previous reports on our financial and non-financial performance.

Here you can find more information and access our latest reports about our environmental performance.

Here you can view our short, medium and long-term plans for protecting our environment and ensuring our water supplies.

With over 2,000 employees delivering essential life services to more than four million customers, there is a role for everyone at Southern Water.

Read more about what we're doing to give back to our communities and customers and how we can help you too.

Here you can read more about our Board of Directors and their experience.

Popular News

Building & Development

Find out what's happening in your area, reported incidents and planned works.

Showing 6 of 18

Our Business Plan 2020–25

To help us create our plan we contacted hundreds of thousands of current customers, businesses, independent experts, regulators (like Ofwat), and many young people who might be customers themselves one day.

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Water is essential to every aspect of our lives

We drink it, cook with it and use it to clean. It grows the food we need, helps generate the energy we use, and goes into the creation of everything we own. But our water supply faces big challenges. The population of the South East is growing fast, and climate change will bring droughts and more extreme weather. It’s a future of more people needing water and wastewater services, with less water to go around.

The vital nature of water, and the need to keep it flowing far into the future is what we mean by  Water for Life . And it’s why we need to start acting now for the challenges ahead. We’re committed to improving the South East’s precious water environment and we take our environmental duties very seriously. We’ve come a long way since our transformation programme started in 2017 – and we’re going further each day. Our investment areas map outlines our plans for 2020-25.

You can also read the full suite of documents submitted to our regulator below:

Revised business plan.

IAP Action Tracker Executive summary Board Statements Technical Annex 1 – Engaging Customers Technical Annex 2 – Affordability and vulnerability Technical Annex 3 – Delivering Outcomes for Customers Technical Annex 4 – Securing Long Term Resilience Technical Annex 5 – Targets, Controls, Markets and Innovation Technical Annex 6 – Securing Cost Efficiency Technical Annex 7 – Aligning Risk and Return Technical Annex 8 – Accounting for Past Delivery Technical Annex 9 – Securing Confidence and Assurance Technical Annex 10 - IAP actions summary

Models and Data

Bill Waterfall Model PR19 Financial Model BPT FM Mapping tool Data Tables commentary Business Plan data tables Revenue adjustments feeder model RCV adjustments feeder model Totex menu WRFIM update

Representations

Securing Confidence and Assurance Executive Summary Delivering Outcomes for Customers Additional Representations Resilience Action Plan Targeted Controls Markets and Innovation Securing Cost Efficiency

Technical Annexes

Materiality threshold supporting calculation

SRN PR19 draft determinations Company representation pro forma

Tables and Models

DD Financial model SRN ST DD DD business plan commentary DD developer services commentary DD developer Services Data Tables DD outcomes Commentary DD Representations Data PR19 Business plan data tables

Resilience Action Plan

Securing Long-term Resilience

Drainage and Waste Water Management Plan

Drainage and Wastewater Management Plans (DWMPs) Southern Water DWMP Delivery Programme

Cover Contents Navigating our plan Chapter 1 – Executive Summary Chapter 2 – Trust, Confidence and Assurance Chapter 3 – Our Ambition Chapter 4 – Customer and Stakeholder Engagement and Participation Chapter 5 – Future Customer Engagement and Participation Strategy Chapter 6 – Outcomes, Performance Commitments and Outcome Delivery Incentives Chapter 7 – Delivering resilience in the round Chapter 8 – Helping customers who need our support Chapter 9 – Great Customer Service Chapter 10 – Innovation Chapter 11 – Wholesale Water Chapter 12 – Wholesale Wastewater Chapter 13 – Retail Controls Chapter 14 – Wholesale Cost Efficiency Chapter 15 – Direct Procurement for Customers Chapter 16 – Risk, Return and Financeability Chapter 17 - Accounting for Past Delivery

Our Business Plan 2020–25 has been produced to be concise, clear and sufficiently detailed in all aspects, but by the very nature of its complexity, requires a lot of supporting evidence to be robust and fully detailed. This further level of evidence and detail is provided in the form of a number of supporting appendices and data tables.

Recognising that it is not in the best interest of our customers or the wider public interest to make all of the contents of these supporting documents public, we have, in the versions of some of the supporting documents published here, made a small number of redactions of information that is either confidential, commercially sensitive, and/or otherwise identified as sensitive for reasons of national security and the requirements of the Security and Emergency Measures (Licensed Water Suppliers) Direction.

TA.0.1 Navigating our Plan TA.2.1 Statements of Board Assurance TA.2.2 Board engagement and challenge TA.2.3 PR19 Assurance Framework TA.2.4 Trust and transparency YouGov full report TA.2.4 Trust and transparency TA.2.5 Meeting our Statutory and Licence obligations  TA.2.6 Legal Instruments (WINEP and DWI Notices) TA.2.7 Letters of Assurance TA.4.1 Customer engagement methodology and findings TA.4.2 Summary of supporting customer insight   TA.4.3 Triangulation of customer priorities TA.4.5 CCG Challenge Log TA.5.1 Future Customer Engagement & Participation principles TA.5.2 Future Customer Engagement & Participation Examples TA.5.3 Future Customer Engagement Strategy (CCG - June '18) TA.6.1 Our approach to PCs and ODIs TA.6.2 Our package of PCs and ODIs TA.6.3 Rationale for AMP6 amendments and discontinuations TA.7.1 Understanding Operational risk and resilience TA.7.2 Corporate risks: Ethical business practices and modern compliance framework  TA.7.3 Understanding risks: High level risk summary table TA.7.4 Demonstrating our Resilience TA.7.5 Investing in our people TA.7.6 Measuring improvements through our performance commitments TA.7.7 Optioneering and Estimating  TA.7.8 Benchmarking Resilience and best practice  TA.8.1 Tackling affordability and vulnerability  TA.9.1 Delivering Great Customer Service TA.10.1 Innovation: Supporting Evidence TA.10.2 Understanding best-practice Innovation TA.11.1 Water AMP7 Comparative Industry Performance Assessment  TA.11.2 Water Horizons - Southern Waters Long Term Asset Management Strategy TA.11.3 Regional Water Grid TA.11.4 Water Resource Bid Assessment Framework TA.11.5 Havant Thicket Reservoir Resilience Project TA.11.WN01 Business Case - Supply Demand Balance TA.11.WN02 Business Case - Nitrate TA.11.WN03 Business Case - Water Treatment TA.11.WN04 Water Networks TA.11.WN05 Service Reservoirs TA.11.WR01 Business Case - Raw Water Pumping TA.11.WR02 Business Case - Impounding Reservoirs TA.11.WR03 Catchment Management Solutions TA.12.WW01 Business Case - Wastewater Treatment TA.12.WW02 Business Case - Network Pumping Stations TA.12.WW03 Business Case - Outfall, CSOs and Detention Tanks TA.12.WW04 Business Case - Sewers and Rising Mains TA.12.WW05 Business Case - Wastewater Growth TA.12.WW06 Business Case - Wastewater Environmental Programme TA.12.WW07 Business Case - Flooding and Pollution Strategies TA.12.1 Wastewater AMP7 Comparative Industry Performance Assessment  TA.12.2 Response to February 2018 feedback in initial bio-resources allocation proposals TA.12.3 Mott MacDonalds PR19 Bio-resources RCV Allocation TA.12.BR01 Business Case - Bioresources Treatment and Growth TA.12.MG01 Business Case - M&G Fleet TA.12.MG02 Business Case - M&G Data and Information Technology TA.12.MG03 Business Case - M&G Buildings TA.12.MG04 Business Case - M&G Research and Development TA.12.MG05 Business Case - Central Costs and PR24 TA.13.1 Doubtful debt and debt management TA.13.2 Management of gaps sites and voids TA.14.1 Cost Adjustment Claim 1 - Bathing Water TA.14.2 Cost Adjustment Claim 2 - Thanet Groundwater Protection Scheme TA.14.3 Cost Adjustment Claim 3 - Growth - Whitfield TA.14.4 Bottom-up Cost Estimation TA.14.5 PR19 Approach to Optioneering  TA.14.6 Oxera Report: Estimate of RPE and frontier shift TA.14.7 Top-down econometric analysis (Botex) TA.15.1 Direct Procurement for Customers TA.16.1 Our approach, evidence and assurance of Financial Resilience TA.16.2 Changes to Capital Structure TA.16.3 Oxera RORE modelling TA.17.1 Performance Commitment Forecasting IAP-pro-forma-6 Southern Water presentation pro-forma Southern Water presentation pro-forma guidance tables

For the latest versions of data tables, commentary and associated data models, see IAP response above.

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Our environmental performance.

Much of our environmental performance, including the latest data on pollution, carbon emissions and bathing water quality, is published here.

Getting involved

Learn more about the organisations we work with and how you can get involved in helping us to create a resilient water future.