John Quick's book on GCR loco liveries is now available and recommended to anyone with a serious interest in modelling the GCR.
It can be obtained from its publishers Black Dwarf Lightmoor as well as from any of your favourite specialist bookshops.
Reading this book helps to understand just how complex and difficult the subject matter is. Possibly the best single research book on the GCR ever and certainly the best published for many years.