Costain Group PLC, through its joint venture CMDP+ with MWH Treatment, has been chosen by Southern Water to lead and execute its strategic asset upgrade program. This marks Costain's latest significant AMP8 award of 2024. The initial seven-year term is valued at a minimum of 500 million pounds, with the possibility of extending for up to five years. CMDP+ has secured a place on two Lots of the new Strategic Delivery Partner framework, continuing the long-standing relationship between Costain, MWH Treatment, and Southern Water. The framework will focus on upgrading water and wastewater assets, including treatment sites, pumping stations, and reservoirs during Asset Management Period 8 (AMP8) and beyond. Southern Water anticipates that its AMP8 program, running from 2025 to 2030, will be its most extensive to date.