Yes I used that map too Norman that's why I assumed it was a Palmers building.
As a lad from Jarrow I don't remember a grey building. Of course "my time" was 40 years after the photo so it could have been demolished but it was usual for the older buildings to remain well into the 40's and 50's. Photos of Jarrow in the early 1900's are structurally the same as those in the 50's.
So I repeat my question in a different way...."Does anyone have any photos of the grey building on the Palmers site!!