The steel structure of a new £60m railway bridge over the M6 has been completed.
With steel structure complete, works to finalise the bridge deck are set to be completed in November.
The new bridge will carry passengers travelling on the West Coast Main Line through Penrith over the busy motorway.
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Network Rail has shared time-lapse footage showing assembly of the new structure by contractor partner Skanska in a specially built compound beside the M6.
The new bridge measures 130m in length and weighs in at around 4,200 tonnes.
The previous Clifton bridge is nearly 60-years-old and weight restrictions mean it can only carry one train at a time, causing delays to services.
The old structure will be removed and new one installed during a dual railway and motorway closures in the first two weeks of 2026.
No trains will run on the West Coast Main Line from Oxenholme to Carlisle between 1 January and 14 January 2026.
To make the most of the same closure, more than 80 kilometres of overhead cables which power trains will also be replaced, as well as an ongoing £61m digital upgrade to signalling systems north of Carlisle.
William Brandon, Network Rail’s project manager, said: “It’s brilliant to see the new Clifton bridge structure now taking shape beside the M6 ready for its ambitious installation in the New Year as part of our major upgrades to keep passengers and freight moving on the West Coast Main Line for decades to come.
“In January we will not only start the main phase to replace the bridge, but elsewhere in Cumbria we’ll also renew over 80 kilometres of overhead lines which power trains and continue with our major modernisation of West Coast Main Line signalling systems. These essential upgrades will involve some closures of the road and the railway, so we’re advising people to plan journeys well in advance while we work with National Highways and our train operators to make people aware of the scale, impacts and future benefits of our multi-million-pound investment.”
Rosario Barcena, Skanska’s rail programme director, said: “We have made fantastic progress, with the new 4,200-tonne structure nearing completion. Demolition of the existing bridge and installation of the new one are both complex and time critical operations, to which we are bringing our expertise from previous similar projects for Network Rail and the latest digital technologies.
“It has been a super collaborative project, where we have worked with Network Rail, National Highways, local authority and supply chain partners to ensure that we are fully prepared.”
The M6 will be shut on two consecutive weekends for the upgrade, from the evening of Friday 2 January to morning of Monday 5 January 2026 and the evening of Friday 9 January to morning of Monday 12 January 2026
During these periods, the motorway will close in both directions between junction 39 at Shap and junction 40 near Penrith.
