Class 37 locomotives growling through Derby station. #class37 #trains #diesellocomotive #britishrailways #railways #trainspotting | Adrian Watson

The sound of a 1960’s class 37 locomotive starting up in the morning. D6700 was the first class 37 built. Seen here at Loughborough Central station on the Great Central Railway | Adrian Watson

The sound of a class 37, English Electric 12CSVT engine ticking over. #trains #diesellocomotive #britishrailways #railways #trainspotting #heritagerailway #class37 #englishelectric | Adrian Watson

A glimpse inside the cab of the first class 37 locomotive built. This was built in 1960 and since entering preservation has been restored to as close to original condition as possible. It is a regular runner on diesel days at the Great Central Railway. | Adrian Watson

🚂 With its distinctive growl and unmistakable presence, the Class 37 Locomotive has become one of the most iconic diesels in British railway history. Introduced in the early 1960s, these powerful Type 3 locomotives worked passenger and freight services across the UK for decades — and many still survive today, beloved by enthusiasts and preserved on heritage lines. 💨 📽️ In my latest video, I dive into the story of the Class 37 — its design, service, legendary nickname “tractors,” and why it co