This is the latest in the very popular series of reprints of classic editions of the famous Ian Allan Publishing 'abc' volumes from the late 1940s to 1960s which have been welcomed both by the generation of enthusiasts who used them when they first came out & also by those who were not around at the time. It lists all the pre-Grouping & Big Four locomotives that were taken over by the newly formed British Railways in the previous year. Also included are the early diesel & electric locomotives & multiple-units.