A £20 million investment is underway to renew overhead power infrastructure on Scotland’s original electrified railway, safeguarding one of the country’s most operationally critical commuter networks for decades to come.
The programme focuses on key sections of the North Clyde lines, which operate from Helensburgh, Balloch and Milngavie through Glasgow’s west end and low‑level stations. As the busiest suburban railway outside London, the corridor plays a pivotal role in keeping Scotland’s wider rail network moving.
First electrified in 1960, the North Clyde routes marked the beginning of modern rail travel in Scotland. More than six decades on, that early investment continues to influence today’s network, underpinning electric services on routes including East Kilbride and Barrhead, with further electrification projects progressing across Fife and the Scottish Borders.
However, much of the original overhead line equipment in the North Clyde area is now over 65 years old and approaching the end of its serviceable life. Network Rail says renewal is essential to maintain safety, improve reliability and reduce the risk of disruptive failures on a route where problems can quickly cascade across the wider network.
Early-stage works are already in progress, including refurbishment of the cantilevers and supporting structures that hold the overhead wires in place. These preparatory activities are designed to reduce risk ahead of the more complex phases of the project.
The main renewal of the overhead wires themselves will take place during Christmas and New Year engineering possessions over the next three years. These periods have been deliberately chosen to minimise passenger disruption, with lower demand allowing for extended line closures.
Ross Moran, route director at Network Rail Scotland, said:
“This stretch of railway was where electrification began in Scotland and marked a real turning point. It changed how people travelled around Glasgow and helped shape the network we use today.
“We know how vital this area is to the railway as a whole. A single issue on the North Clyde can quickly affect services well beyond Glasgow, which is why this work is being planned now rather than waiting for more serious failures and wider disruption later.
“This project is about looking after the railway that people rely on every day. By renewing it now, we are helping to make sure it continues to serve passengers and communities long into the future.”
ScotRail has welcomed the investment, highlighting the importance of long‑term infrastructure resilience for day‑to‑day operations across the central belt and beyond.
Mark Ilderton, ScotRail service delivery director, said:
“The North Clyde routes are a vital part of Scotland’s Railway, connecting communities from Argyll and Bute right through to West Lothian, supporting thousands of journeys every day.
“This investment by Network Rail will help improve the long-term reliability of the infrastructure that keeps our electric trains moving.
“We know that some journeys will look a little different when the main body of work takes place later this year, which is why we’ll be working closely with Network Rail to keep customers updated, and make sure they have the information they need to plan ahead and travel with confidence.”
Image credits: Network Rail
