I've been carrying out a bit of research into the history of Nechells Power Stations (I used to work there in the late 60's/early 70's) and found this set of photos online,showing the railway operations there.
https://industrialrailwaysofthemidlands.fotopic.net/c1710886.html
Some of the photos must have been taken in the early 70's as the older 'A' power station was then being demolished.
Also can be seen in the backgrounds of some of the photos,are the M6 motorway near Spaghetti Junction,and Nechells Gas Works.