What an amazing Story, It seems the building has had quite the past. The window your mother pointed out is now our Conference room on the 1st floor and our office on the 2nd. I'm sure the inside of the building is nothing like it was when your grandad work here.
From what I have found out the building was converted in 1991 into 8 Units for industrial use. I know that Unit 4 was used as a printing press for a number of years after the conversion. The council converted the bulding and in doing so removed or covered up most of the original iron works. But the company I work for (local software