The WR diesel hydraulic locomotives have always exercised a special fascination for the modern traction enthusiast. One of the most interesting aspects of their history was the wide variety of different color schemes they appeared in over the comparatively short period they were in service, which encompassed almost every permutation of the old British Railways of the 1950s and 1960s, and post-1965 corporate image British Rail liveries. This book looks in detail at the liveries of these locomotives during the diesel hydraulic era from 1958 to 1977, illustrating every major and most minor variations. With over 150 images, it is an invaluable reference for the railway modeller and railway historians, and a feast of nostalgia for all fans of the glory days of diesel locomotives.