A66 Dualling Starts in November on Nine-Year Programme

By Marcus Bennett

Main construction on the £1.5bn-plus A66 dualling scheme will begin in November, after the Government approved a revised nine-year programme that stretches the build by four years. Balfour Beatty, Kier and Aureos will deliver the Northern Trans-Pennine upgrade under the new timetable, replacing the five-year accelerated target set under the previous administration.

The confirmation came through the Budget, which set phased construction starting next month to complete a continuous 50-mile dual carriageway between the M6 at Penrith and the A1(M) at Scotch Corner. A civils and earthworks specialist is already mobilised around the Penrith end of the route.

What does the longer timetable change?

The nine-year programme marks a major shift for a scheme previously billed as a flagship for faster infrastructure delivery. Under the Government's Project Speed initiative, construction was to be compressed from ten years to five, with work starting in 2024 and the road opening in 2029. The revised programme adds four years to that planned construction period and spreads the spending window accordingly.

For contractors and supply chains, that means a longer, phased pipeline rather than a compressed burst of work. It also removes the delivery pressure that made the scheme a test case for accelerated major projects.

Scope of the works

The three delivery partners will upgrade the remaining 18 miles of single carriageway and improve key junctions along the route, strengthening links between Cumbria and the North-East. Development consent was granted in March 2024.

The plans include:

• Five bypasses along the route
• An underpass at Kemplay Bank roundabout near Penrith
• Junction improvements across the 50-mile corridor

Advance works are already under way. National Highways is carrying out vegetation clearance, drainage improvements and central reservation strengthening ahead of the main construction phase.

Who is Aureos?

Aureos is the renamed Keltbray Infrastructure Services business, which EMK Capital acquired in August 2024. Its place alongside Balfour Beatty and Kier gives the joint delivery team a mix of tier-one capacity and specialist earthworks capability.

The November start gives the industry its first confirmed major-highway mobilisation since the consent was sealed in March 2024. How the phased programme translates into package lettings and workforce demand over the nine-year window will define the scheme's value to regional contractors.