I'm new to railway modelling, and as I already happened to own a couple of smaller GWR engines and stock, was thinking of starting a layout inspired by a station on a 'smaller' GWR line (ie not a main line); however I'm not really sure where to start in terms of research. Are there any good resources for GWR branch lines and such that people would recommend? I don't think I'll go for modelling a real location, more just taking inspiration from real stations.
Also, as a specific question: I have a GWR signal box kit from Metcalfe which has options for either a stone or red brick finish, which of these would be more 'accurate'?