Costain and Vinci have joined forces to scoop a deal to deliver the M4 Corridor upgrade around Newport.

Costain has managed to secure a 50% stake in a three-way joint venture with Vinci Construction Grands Projects and Taylor Woodrow.

The partners were ahead of an international line-up of bidders teamed for the £750m project.

Bidders included Bouygues/Alun Griffiths/Roadbridge; Ferrovial/Dawnus; FCC/Sir Robert McAlpine/Morgan Sindall; and a Balfour/Carillion joint venture.


The development will involve 24km of new motorway and a 2.5km long cable-stayed viaduct crossing of the River Usk built, along with a remodelling of M4 junctions 23 and 29.

Scheme development work is due to commence immediately, with a Public Local Inquiry expected for winter 2016/7.The second stage of the ECI work could start in spring 2018.

Andrew Wyllie, Chief Executive of Costain, said: "We are delighted to be developing this critical infrastructure scheme for the Welsh Government. This award is further demonstration of the importance to Costain of long-term strategic partnerships with our Customers, and our ability to deliver integrated consulting and project delivery services."

The project is expected to completed by 2022.

(IT/MH)