The reason i asked was ,there`s nothing showing on the BGS map,the bottom seam shown is a lot higher,but sometimes there are Rider seams and even un-recorded seams,seams not proven elsewhere.
If one could see the Seam index on the left hand side of that BGS map shown,that would show everything proven in the area.
You would`nt by any chance know the NGR for that level?
As i know someone in the Coal Authority who might be able to search out the name of this level and seam worked.