This pencil graffiti has lasted surprisingly well considering it is supposedly 70 years old……

Being a regular visitor to both derelict and active industrial sites, I’ve walked across all kinds of surfaces, but never a rubberised one. The site roads on the southern section were coated with a rubber like asphalt designed to stop sparks in the event of something metallic being dropped. Some of this covering is still present and can been close up on the railway platform

I’m presuming this meant that the route avoided any production or storage areas where you would need protective clothing.