Was this the first train to break the 100mph barrier? Discover the truth behind one of Britain’s most iconic locomotives—GWR 3440 ‘City of Truro’.
Join us as we journey back to the early 20th century to explore the incredible story of the GWR 3700 Class No. 3440, better known as City of Truro. Built in 1903 at Swindon Works under the leadership of legendary engineer George Jackson Churchward, this 4‑4‑0 locomotive became an instant legend thanks to one sensational claim: that it was the first steam locomotive in the world to reach 100 miles per hour.
On 9 May 1904, during a run with the prestigious Ocean Mails special express, City of Truro reportedly hit a top speed of 102.3 mph while descending Wellington Bank in Somerset. The timing was recorded by respected railway journalist Charles Rous-Marten, who claimed to have clocked the locomotive using a stopwatch. Though the claim was never officially publicised at the time—possibly due to safety concerns or lack of dynamometer confirmation—it has become one of the most hotly debated moments in railway history.
In this video, we explore:
The technical design of the 3700 Class, including later upgrades like the superheater (1911) and piston valves (1915).
How City of Truro went from locomotive number 3440 to 3717, and why enthusiasts still refer to its original number with pride.
The locomotive’s operational history, retirement in 1931, and multiple returns to steam—including its last major overhaul in 2004 for the centenary celebrations.
Where you can see it today: proudly preserved at the STEAM Museum in Swindon, just a stone’s throw from where it was built.
We also discuss the controversy behind the 100mph claim, the lack of official verification, and whether the performance was truly possible given the technology of the time. Regardless of the final verdict, there’s no denying that City of Truro is a symbol of innovation, speed, and steam-powered elegance.
Whether you’re a lifelong railway enthusiast, a fan of British engineering, or just love a good historical mystery—this video is for you.
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Let us know in the comments: Do YOU think City of Truro really hit 100mph? Or is it a beautifully told myth?
Watch now and travel back to the golden age of steam…
Video Credits
‘City of Truro’ at the Severn Valley Railway in 2008
GWR 3700 City class no. 3717 ‘City of Truro’ working NRM steam rides
Severn Valley Railway – 3440 City Of Truro during 2008 visit.
3440 ‘City of Truro’ on the Mainline
SOLE SLIP_ ‘City Of Truro’
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