IN Brief:
- Nine contractor teams have been identified for the Major Projects Framework covering London and the South East.
- The framework is valued at £4bn overall; no individual contractor is guaranteed that amount.
- The procurement standstill ends on 3 November, with contract signing anticipated no earlier than 4 November.
Thames Water has selected nine contractor teams for an intended £4bn Major Projects Framework covering water and wastewater infrastructure across London and the South East. The selections were published on 23 October, and the standstill period runs until 3 November before the framework agreements can be signed.
The nine teams are BAM Nuttall, Barhale, Costain, Murphy, Galliford Try, Kier, Mott MacDonald Bentley, Binnies with Ferrovial Construction and Cadagua, and Amentum with Taylor Woodrow. The joint teams combine the capabilities of more than one legal entity, while the framework names the delivery groups rather than allocating a fixed programme to each business.
The framework provides a procurement route for major capital projects during Asset Management Period 8, or AMP8, the five-year period running from April 2025 to March 2030. It can also be used for work in AMP9 under the agreed extension provisions. Thames Water will still need to approve the scope and funding of individual schemes before awarding work through the framework.
The potential workload includes treatment works upgrades, pipelines, pumping stations and associated civil engineering. Pre-construction services and engineering design can form part of a project before major site operations begin, followed by construction, installation of mechanical and electrical equipment, testing and commissioning. The framework brings those disciplines into a common route for subsequent project appointments.
A project-specific contract will determine what each selected delivery team is instructed to undertake. Design may first establish hydraulic capacity, land requirements, construction access and the condition of existing assets. Detailed surveys, consents and procurement of long-lead equipment can then influence the construction sequence and the date at which a site is ready for major works.
The £4bn value applies to the framework as a whole; it is not nine separate £4bn contracts. Thames Water has not committed an equal allocation to every team, and expenditure will depend on the approved projects brought forward under the arrangement. That distinction also matters when contractors plan labour and plant requirements: a place on a framework creates an opportunity to compete for or receive call-off work, not a guaranteed construction pipeline.
The standstill period ends on 3 November, and formal agreements are expected no earlier than 4 November. The initial framework term is scheduled to run until 31 March 2030, with an extension mechanism potentially taking it to 31 March 2035. Specific construction dates will be established separately as projects pass through design, consent and investment decisions.
Upgrading a working water treatment plant involves connecting new civil structures with process equipment that must maintain flows and treatment performance. Tanks and foundations may be constructed beside operating assets, with new pumps, valves, pipework, instrumentation and control systems installed before planned connections are made. Commissioning sequences must then demonstrate that the new equipment performs as intended under the required operating conditions.
The construction constraints differ for pipelines. Excavation routes must account for ground conditions, other buried utilities and traffic, while connections to live mains may require temporary arrangements and carefully planned isolation periods. Pumping stations combine underground civil works with mechanical plant, electrical supplies, controls and access for future maintenance, each affecting the geometry and sequencing of the finished facility.
The contractor panel brings together organisations with experience in major civils, infrastructure delivery, engineering design and water process work. Their eventual roles will depend on the requirements of individual projects, particularly the balance between new construction and modifying operational assets. Multi-company teams can combine those resources under a single project arrangement, but their internal allocation of tasks has not yet been specified.
Operational continuity can determine the timetable for construction inside treatment facilities. Existing units may have limited periods available for isolation, while temporary bypasses or phased connections can be needed to maintain service. Planned outages must be coordinated with plant performance and environmental requirements, so the programme for installing concrete structures may not be the same as the programme for bringing new treatment capacity into use.
On a constrained site, excavation, heavy lifting, electrical installation and process commissioning may need separate work areas or consecutive access periods. Site investigations can identify buried services and foundations before detailed methods are selected. The scope for each future award will determine which risks and interfaces sit with the construction contractor and which are retained by the utility or other suppliers.
Once the standstill period has elapsed, Thames Water can finalise the framework and begin placing project-specific contracts in accordance with its approvals. The nine teams provide a delivery pool for major infrastructure work across the region, while individual awards will establish precisely which treatment facilities, pumping stations and pipelines progress into construction.
