I run a blog dedicated to historical railways around Malvern (http://www.malvernrailway.co.uk) and have recently come across a map showing an old signal box just south of the old Malvern and Tewkesbury Junction on the Midland line in Malvern. There were two boxes in close proximity at this stage, a GWR box on the surviving Worcester-Hereford line (http://www.roscalen.com/signals/MalvernWells/BrianIles/M+TJBoxEdit.jpg), and the Midland box to which I refer.
I know this site has a diagram for the Midland Box, but I wonder if anyone had ever seen a picture of it? Best I have got is a very distant aerial view from the Britain from Above collection. Any help would be really appreciated.