The winners will now carry out work under the ‘Strategic Delivery Partner’ or ‘Infrastructure Low Complexity Delivery Route’ frameworks. 

Strategic Delivery Partners will be responsible for major infrastructure projects like constructing new pipelines and pumping stations, or non-infrastructure schemes like upgrades to water supply works or wastewater treatment works under the AMP8 spending programme.

The firms awarded places under this deal are Costain and MWH Treatment (as part of the CMDP+ joint venture), Kier Integrated Services Ltd, and Galliford Try Construction for non infrastructure above ground works and Morrison Water Services Ltd for infrastructure works.

The Infrastructure Low Complexity Delivery Route framework will either focus on water or waste, and will typically involve design and build projects on our water supply network or sewers.

Places have been awarded to Clancy Docwra Limited, United Living Infrastructure Services, and Barhale Limited for works on the water side, and Clancy Docwra Limited, J Browne Construction Co Ltd and Morrison Utility Services Ltd on the wastewater side.

The total value of the frameworks is approximately £3.7bn over the initial contract term, which is seven years for the ‘Strategic Delivery Partner’ framework and five years for the ‘Low Complexity Delivery Route’ framework. Both have options to extend.

Southern Water’s Chief Financial Officer, Stuart Ledger, said: “This announcement marks an important milestone in our preparation for the next regulatory investment period 2025-30 and beyond.

“Southern plans to more than double its investment over the next five years to meet the needs of customers and the environment. I am confident that working together with our partners we will fully meet this challenge.”