Network Rail and specialist contractors Skanska have successfully replaced the Clifton Bridge over the M6 motorway near Penrith, Cumbria, in northwest England. The project is part of a £60m (€71m) upgrade to the West Coast Main Line, Europe’s busiest mixed traffic route.
The 130-metre-long bridge was removed and replaced over two consecutive weekends, requiring full motorway closures and a detailed, highly coordinated engineering operation. It also saw rail services diverted over the normally quieter Settle and Carlisle Route – which, despite wintry weather, remained open throughout the project.
The new structure, pre-built offsite, was installed using specialist self-propelled modular transporters with more than 600 wheels. The M6 reopened 13 hours ahead of schedule, minimising disruption for road traffic and local communities on diversionary routes. Railway teams are now preparing to reinstate track, signalling, and overhead lines. Once completed, the West Coast Main Line will fully reopen by this Thursday, 15 January, restoring services between Oxenholme and Carlisle, and the whole length of the route between London and Glasgow.
Demolition and installation milestones
The original 1960s concrete bridge, spanning six motorway lanes, was demolished over a 60-hour full motorway closure. Excavators and specialist teams removed the structure safely and efficiently. On Saturday (10 January), the new 4,200-tonne steel-and-concrete bridge was manoeuvred into position in just three hours. The design, say Network Rail, is good for a 120-year lifespan, so we won’t be copying and pasting this story anytime soon.
“It’s a testament to the hard work of hundreds of people that we’ve been able to install this huge new structure both successfully and speedily,” said Christian Irwin, Network Rail capital delivery director. “Our focus now turns to final bridge checks before we reinstate the tracks, overhead power lines and signalling systems so we can fully reopen the West Coast Main Line by 5am (0500hrs) on Thursday.” That will be the last opportunity for passengers on Avanti West Coast to experience diversion via the scenic Settle and Carlisle line, which has provided an alternative route for the past two weeks.
Collaboration eases disruption
The roads agency, National Highways, coordinated two full weekend M6 closures, allowing demolition and installation to proceed safely (although there was a non-fatal road accident on the first weekend). Steve Mason, their programme delivery manager, was full of praise for the teams involved. “Reopening the M6 thirteen hours early is a tremendous achievement. Despite severe weather conditions, the teams involved worked tirelessly to deliver this project to future-proof one of the most important railway lines in the country.”
“We’ve worked closely with Network Rail and National Highways to re-prioritise our work so that we could re-open the motorway much earlier than planned,” said Rosario Barcena, Skanska UK rail programme director. “It’s been achieved thanks to our whole team, including our amazing supply chain partners.”
Following the bridge installation, teams are completing final inspections before reconnecting track, overhead lines, and signalling. Rail replacement services remain operational between Oxenholme and Carlisle until full reopening on Thursday 15 January. This £60m scheme is part of a nearly £200m festive season investment and contributes to a wider £400m programme over the next four years aimed at future-proofing the West Coast Main Line.