Southern Water
AMP8 Frameworks & Supplier Opportunities

Key Facts

• Serves 4.7 million customers across South East England
• Kent, Sussex, Hampshire, Isle of Wight
• Disputed FD — CMA redetermination concluded March 2026
• Bills among the highest rises in sector — 53% real terms by 2030 under FD
• Greensands Holdings parent company

AMP8 Investment Programme — Key Priorities

• CMDP+ major capital delivery programme
• 8-year Technology Specialist Services open framework — rolling entry for digital suppliers
• Sewer rehabilitation and maintenance — Cappagh Browne and McAllister Bros appointed
• Professional services framework — 7 consultancies appointed June 2024
• Storm overflow improvements
• Wastewater treatment upgrades for environmental compliance

Confirmed Framework Appointments

• Professional Services Framework — 7 firms: AECOM, Arup, KPMG, Mott MacDonald, Stantec, Turner & Townsend, WSP (Jun 2024)
• CMDP+ Capital Delivery (Costain + MWH Treatment JV)
• LCDR Low Complexity Delivery Route (United Living/Afeco, Kier, Galliford Try)
• Fleet Management £45m (awarded May 2025)
• Technology Specialist Services Framework — 8-year open framework (rolling entry)
• Sewer Rehabilitation (Cappagh Browne, McAllister Bros — Sept 2024)
• £11m Hampshire Groundwater Flood Resilience Programme (Jun 2026) — £5m earmarked for St Mary Bourne; further schemes at Penton Mewsey, Appleshaw and Goodworth Clatford. Work focused on sealing sewer networks to reduce groundwater infiltration. Active construction spend in Hampshire for specialist sewer lining and network sealing contractors through AMP8.
• £300m new equity commitment — AMP8 now fully funded at £2.8bn (Jun 2026) — Macquarie Asset Management and Asterion Industrial Partners have committed £300m, completing the £2.8bn equity package underpinning Southern Water's £8.5bn AMP8 capital programme. Suppliers working across CMDP+ and LCDR delivery routes can plan on the basis of a fully funded AMP8 pipeline through 2030.
• Hampshire Water Transfer DCO — Application Accepted for Examination (Jun 2026) — Southern Water's Development Consent Order application to abstract from the River Test for distribution across Hampshire has been accepted by the Planning Inspectorate and enters formal examination. A major strategic resource option for the South East. Contractors with experience in water transfer civil engineering and river abstraction infrastructure should monitor for construction procurement on DCO approval.
• Market Engagement — Biogas Assets, Digester Maintenance & Tanks (Jun 2026) — Southern Water seeking intelligence from providers of biogas upgrading equipment, anaerobic digester maintenance and tank lining services. Pre-procurement: register interest now to shape the framework design before formal procurement launches.

How to Find Southern Water Tenders

Water company procurement is spread across multiple portals and notification systems. Knowing exactly where to look — and when — is the difference between catching a framework in time and missing the window.

Water Industry Hub monitors all water company procurement channels and delivers relevant notices directly to your inbox — so you never have to check multiple portals manually.

Supply Chain Route Map

Water company frameworks operate on a tier structure. Tier 1 contractors hold a direct contractual relationship with Southern Water. Tier 2 and Tier 3 specialists subcontract through Tier 1 framework holders. If you cannot win a Tier 1 position, approach the Tier 1 framework holders above to discuss Tier 2 opportunities — framework holders actively need to build specialist supply chains.

Related Resources

How to Get on a Water Company Framework — Complete Guide 2026 →

WIRS, WIRSAE, WIAPS and UVDB — Complete Accreditation Guide →

Live Water Sector Tenders and Contract Awards →

Water Sector Supplier Directory — 7,830+ Companies →