Technical documents

These documents give more detail on the solutions we are exploring. They include our technical investigations, feasibility studies and submissions to our regulators.

Overview of RAPID and the gateway process

The major infrastructure projects we’re exploring – desalination, water recycling and new bulk supplies – are being overseen by the new Regulators’ Alliance for Progressing Infrastructure Development (RAPID). RAPID is an advisory board that makes recommendations to Ofwat.

It comprises Ofwat, the Environment Agency and the Drinking Water Inspectorate – and is being advised by Natural England.

The group is overseeing more than a dozen strategic water resources projects for several water companies to identify optimal regional and inter-regional solutions that could be started in 2025-2030.

For more information on RAPID, see ofwat.gov.uk/regulated-companies/rapid.


Our Interim Update submission to RAPID

You can view copies of our submissions to RAPID below. Please note, some company-sensitive information has been redacted.

Interim Update – Solution Summary

Interim Update – Regulator and Other Statutory Bodies Engagement Plan

Interim Update – Customer and Stakeholder Engagement

Interim Update – Efficiency of Expenditure

Interim Update – Activity Plan to Gate 2

Interim Update – Options Appraisal Process

Interim Update – Conceptual and Detailed Feasibility – Desalination

Interim Update – Conceptual Design Report – Annex 1 Desalination 


RAPID's Gate 1 recommendations

RAPID has published its recommendations on our Gate 1 submission.

View the documents


Our Gate 1 submissions to RAPID

You can view copies of our submissions to RAPID below. Please note, some company-sensitive information has been redacted.

Southern Water Accelerated Gate 1 Submission Summary

Desalination Accelerated Gate 1 Preliminary Feasibility Assessment

Water Recycling Accelerated Gate 1 Preliminary Feasibility Assessment

West Country Sources North Accelerated Gate 1 Preliminary Feasibility Assessment

Additional Solution Accelerated Gate 1 Preliminary Feasibility Assessment

Southern Water Accelerated Gate 1 Navigation and Glossary

Southern Water Accelerated Gate 1 Priority Actions Submission


Section 20 Operating Agreement

View the legal agreement we signed with the Environment Agency (EA) in 2018:

Section 20 Operating Agreement

 
 
 
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