01
Executive overview
Key findings
Around £8.9 billion: investment to deliver in 2025-30 (joint regulator report, October 2026)
£3.1 billion: Strategic Delivery Partner framework for capital works, awarded in August 2024
929: environmental schemes due by 31 March 2030; 10 completed in year one
42: live Drinking Water Inspectorate improvement items, with deadlines from October 2026 to 2035
02
Buyer relevance
Who the report is for
Water treatment and recycling technology suppliers
Prepare for the Littlehampton & Medway tender closing on 1 April 2027 and the Hampshire contract estimated to start in 2029.
Civil, mechanical and electrical subcontractors
Identify the four Strategic Delivery Partner holders and the Low Complexity framework firms that control call-offs under the £3.1 billion framework.
Environmental and sustainable drainage contractors
Track the £1.3 billion Sustainable Drainage and Habitat Restoration Framework, which closed to bids on 4 March 2026, and the 929 environmental schemes due by March 2030.
Business development teams ranking UK water accounts
Use the Opportunity Register and the Commercial Priorities table to decide where to spend bid effort first.
03
Decision scope
Questions answered
Who holds Southern Water's main capital framework?
The £3.1 billion Strategic Delivery Partner framework, awarded in August 2024, is held by the CMDP+ joint venture (Costain and MWH Treatment), Kier, Galliford Try and Morrison Water Services.
What can suppliers bid for directly now?
The Littlehampton & Medway water recycling tender, for up to 33.4 million litres a day in drought, closes on 1 April 2027.
How large is the Hampshire water recycling contract?
The market engagement listing describes a 30-year contract estimated to run from 11 September 2029 to 31 March 2059; in 2024 the company put the construction opportunity at about £1.3 billion.
Who holds the wastewater network contracts?
Four lots worth £466 million went to Lanes Group (£272 million and £26 million), Cappagh Browne (£120 million) and McAllister Bros (£48 million).
04
Inside the report
Inside the complete report
1. The Account at a Glance
2. Organisation and Decision-Making
3. Financial Position
4. Priorities and Pressures
5. How Southern Water Buys
6. Opportunity Register
7. Commercial Priorities: Where to Focus First
8. Watch List: What to Monitor and What to Do
Source Register
05
Public preview
What to watch next
Ofwat cost change final decision (December 2026)
Decides allowances for Hastings Resilience, Sandown and other large schemes in the £749 million draft.
Littlehampton & Medway tender (closes 1 April 2027)
An open direct procurement for new drought supply.
Hampshire examination and direct procurement tender
Sets the timing of a 30-year contract.
Final £300 million of equity (before 31 March 2027)
Underpins the investment programme.
Opportunity Register: status, stage, existing contractors and access routes for Southern Water's open and emerging work.
06
Included
What you receive
The complete PDF report: 11 pages, 9 sections, 6 tables and a register of 23 sources.
This edition
November 2026, First edition.
07
Evidence & method
Evidence and method
The brief draws on regulator publications from Ofwat, the Competition and Markets Authority, the Environment Agency and the Drinking Water Inspectorate, and on Southern Water's audited annual reports. Procurement status comes from published tender and award notices, contractor announcements and trade press, checked on 11 November 2026.
Sources
23 sources, listed in the report's source register. Evidence current to 11 November 2026. Principal data periods: FY2025-26 annual report (year ended 31 March 2026); 2025-30 price control as redetermined in March 2026; regulators' 2025 and FY2025-26 performance data. Project and procurement status checked against public sources on 11 November 2026. All currency is pounds sterling (£)..
08
Lead analyst
Robert C. Brears
Founder, Our Future Water Intelligence
Robert C. Brears is a water-security specialist and author whose work examines utility governance, infrastructure investment, climate resilience and long-term water-system change for executive and policy audiences.
- Decision-focused utility intelligence
- Published water-policy author
- Evidence-grounded system analysis
09
Buyer FAQs
Before you purchase
Who can use the report?
Licensed for internal use within one purchasing organization. The PDF and its contents may be shared with colleagues within that organization. External redistribution, resale and public publication are prohibited without permission.
How is the report delivered?
The PDF is available to download immediately after confirmed payment, through our secure delivery system.
Can my organization buy wider access?
Institutional purchasing: For invoice enquiries, multi-organization licensing or broader access requirements, contact Our Future Water Intelligence.
10
Southern Water: Utility Account Brief
- Format
- Length
- 11 pages
- Edition
- November 2026, First edition
- Price
- USD 499
11
Report details
Publication details
- Publisher
- Our Future Water Intelligence
- Report family
- Utility Account Brief
- Edition
- November 2026, First edition
- Format
- Length
- 11 pages
- Reference
- OFW_EXT_SOUTHERN_WATER_UTILITY_ACCOUNT_BRIEF_811a23fb0f81
- Evidence current to
- 11 November 2026
14
Explore this report family
More Utility Account Briefs
Explore the same report family covering other utilities.
Berliner Wasserbetriebe: Utility Account Brief
- Geography
- Berliner Wasserbetriebe
- Edition
- October 2026, First edition
- Length
- 12 pages
Department of Energy, Abu Dhabi Emirate: Utility Account Brief
- Geography
- Department of Energy, Abu Dhabi Emirate
- Edition
- October 2026, First edition
- Length
- 12 pages
Utility Account Brief
Denver Water: Utility Account Brief
- Geography
- Denver, United States
- Edition
- October 2026
- Length
- 10 pages