Southern goods shed

I'm in the middle of one of those seemingly endless building projects namely a LBSCR goods shed. As of late the whole thing bar a few bits and bobs is Wills sheet. The further I go through it the more there is to do. The research takes time: at the moment I'm on the limited internals like a platform, but without period photos it's all conjecture - well it will be until it's done and some smartarse tells me it's all wrong. The main carcass is done though just doors and the thrilling roof to do.