Reader contribution
InterCity 125: the train that helped revive British Rail
Fast, distinctive and remarkably long-lived, the High Speed Train changed expectations of long-distance diesel travel in Britain.
By UK Railway Watch editorial team · 17 Oct 2026
The InterCity 125, often known as the High Speed Train or HST, became one of the defining trains of British railway history. Its power cars are classified as Class 43, while InterCity 125 describes the train and the brand that made it famous.
The prototype appeared in the early 1970s, and production trains followed from the mid-1970s. The design was built for regular running at 125mph, giving the train its name. Its striking aerodynamic nose was shaped by industrial designer Sir Kenneth Grange.
The HST arrived at a crucial time for British Rail. It offered much faster journeys on major routes without needing full electrification. The National Railway Museum credits the train with helping to reverse British Rail’s fortunes and spark a renaissance in rail travel.
In 1987 an HST set a world speed record for diesel traction at 148mph. It also became known for its comfort, reliability and familiar sound, making it a favourite with passengers and enthusiasts alike.
The first production power car, 43002, was later named Sir Kenneth Grange and is now at the National Railway Museum. Other HSTs have remained in service for decades, adapted for different operators and uses, including routes in Scotland and specialist infrastructure work.
Few trains have had such a long and influential career. The InterCity 125 proved that well-designed rolling stock could transform the image of rail travel and win passengers back. Its legacy is visible today in Britain’s expectation that inter-city trains should be fast, frequent and comfortable.
This is a reader contribution reviewed for relevance and safety. The views expressed are the author’s own.