The Deltics were a transport phenomenon, they improved timings on the east coast mainline from poor steam locomotive times to matching the new electric locomotives introduced on the west coast mainline.
Introduced in 1961, 22 production locomotives were built and at the time of building they were the most powerful locomotives in the world..
The Deltics were a transport phenomenon, they improved timings on the east coast mainline from poor steam locomotive times to matching the new electric locomotives introduced on the west coast mainline