I work out west quite a bit and there are loads to be spotted, usually well overgrown though, they look like bus stops from some angles so as you drive past you can sometimes miss em.
Cheers guys. I've often past it but until I started to document derelict places in the county I have never stopped. This dereliction is quite adictive, lol!
Anyway, Philip here is what you requested, the doorway faces out on to the road on the L/H side of the box.
God, I've just looked that the DOB database & there is one just about 50 yards away but the otherside of the road! How did I miss that? Nevermind I'm down that area again next week so watch this space.