This is a study of the train services on the GWR between the two wars. Starting with a description of the development of GWR it looks at changes in travelling habits, developments in locomotives, rolling stock and company lines within the economic and legislative framework under which it operated. P.B Semmens is the author of over 20 books including GW Steam in Close-up, History of the Great Western Railway and The withered arm (Southern West of Exeter). Between 1975 and 1987 he was Assistant Keeper at the National Railway Museum.