Derby’s Class 25/3
Perhaps one of the most recognisable diesel locomotives of the 1960s was the popular and versatile Class 25, a design that reached its best with its final version, the 25/3, which first appeared in 1965, as EVAN GREEN-HUGHES describes.
Above: The final locomotives of the Class 25/3 fleet were delivered in BR blue with full yellow ends with the first to be completed in this new corporate colour scheme being D7660. In April 1967 two-month old Class 25/3 D7672 (later 25322 and 25912 Tamworth Castle) stands at Derby shed in the company of another Class 25/3 and a Class 47. Mike Jefferies/Railphotoprints.uk.
At the time of the British Railways Modernisation Plan of 1955, traffic requirements on the system were vastly different to those of today, and there were many trains which ran with light loads over fairly short distances. For these types of train there was a requirement for a reliable all-purpose locomotive with modest power which had been answered by several new designs including a family of Bo-Bo Type 2s produced at Derby Works.