There are some real good snippets on that site.
I don't know if I got this from there or elsewhere.

The legend with it said that the area marked 'site' was actually the blacksmiths building that was used in part as a changing room. Looking at google earth the building there today is/was a car tyre outfit and looks too new to be from the late 1800s. However one view shows this :-

The side wall has an area that has been bricked in whcih together with the window could be a large entrace. Maybe the building is older than it looks. It just made me wonder if something from our Perry Barr days still exists.