Thames Water has agreed the final, and biggest, framework for design and build construction partners for its AMP7 programme.

The clean and wastewater projects will include schemes to provide additional resilience to potable water supplies and protecting and enhancing the environment within communities across London and the Thames Valley.

The frameworks are extendable into AMP8 and could see Thames award up to £4bn of investment to undertake work on all types of above and below ground assets.

Following the awards of frameworks in two lots earlier this year, five further lots of successful contractors have been announced.

The successful partners are:

Lot 3: Non-Infrastructure: Galliford Try and MWH Treatment (London).

Lot 4: Non-Infrastructure: Interserve and Mott Macdonald Bentley (Thames Valley).

Lot 5: Infrastructure: J Murphy and Barhale Ltd (London – North).

Lot 6: Infrastructure: Morrison Utility Service and Galliford Try (London – South).

Lot 7: Infrastructure: Morrison Utility Service and Mott Macdonald Bentley (Thames Valley).

John Bentley, Thames Water’s capital delivery director, said: “We’re delighted to have now appointed our partners to plug the final piece of the jigsaw for our AMP7 delivery. We have ambitious plans and are looking forward to working together to outperform expectations. Thames cannot achieve success without our partners being successful and we’re committed to making that happen.”

The latest geographical frameworks follow on from two lots announced in May and will run parallel to the Thames-wide frameworks.

Last year, Thames Water announced its decision to move away from an alliancing approach and implement an “intelligent client” operating model across its capital delivery function during AMP7.

This model will see the company bring more activities in-house in the key areas of asset management, programme management, project management, technical assurance and commercial management.

Work will be delivered through a series of delivery “runways” covering all of the capital programme and these latest frameworks will operate on Runway 2, the main delivery route.