The Southern Region of British Railways had long sought to design a locomotive capable of working on electrified lines and non-electrified station yards and sidings. In 1959 British Railways approved a design, designated Class HA, later British Railways Class 73, which combined the electrical equipment of the latest EMU design with the standard English Electric diesel engine in one bodyshell. An initial order was placed for six locomotives but allocated to Eastleigh Carriage and Wagon Works because the design used stock components normally found on the multiple unit fleet.

The locomotives were released to traffic during February 1962 and were allocated to Stewarts Lane depot from where they powered the mundane duties of freight, parcels and empty stock services. They also tested the principle of high-speed propulsion of passenger trains prior to the adoption of the principle for the electrification of the Waterloo – Weymouth line as far as Poole. Included in this scheme was the ordering of a further 43 improved Class 73 locomotives which were built by English Electric.

The locomotives proved a useful design but when British Railways was privatised in 1994 the new operator considered them surplus and sold them out of service. The original 6 locomotives had already been transferred north to Merseyside to work on the local electric network. Although initially considered unsuitable by the original operator they were highly regarded by many companies hence were sold on to continue working on the national network. Some were converted for special purposes thus were formed into sub-classes hence as at December 2022 30 of the 49 fleet still remain active in mainline service.

About the Author: 
Fred Kerr is a photographer whose lifelong interest in railways began in Edinburgh during the early 1950s and has continued throughout his life since. His family move to Northamptonshire in 1956 introduced him to the Midland Main Line where the transition from steam to diesel traction became important as Derby Works reflected the change with new locomotives being tested and introduced to service. His early ventures into photography began in 1961 but became established during his University years in the early 1970s. Taking early retirement in 1994 he has spent time working for Colin Garratt, a muse whose inspiration provided opportunities to photograph railway scenes that have proved to be historic as the railway undergoes changes in both its structures and operations.

Author - Fred Kerr 
Publisher - Pen & Sword Transport
Hardback
Pages: 120
Illustrations: 221 colour illustrations
ISBN: 9781399048811
Published: October 2023

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