What was the prototypical ratio of locos:coaches:goods wagons historically, and how close to this ratio does any modeller actually get with the stock they own?
In a lovely little book, Our Railway History by the wonderfully named Rixon Bucknall (I knew his brother Barry) there is an interesting table that I thought might be of relevance to this discussion, showing the situation at grouping. The information came from The Railway Year Book.