I remember when I was a youngster the worse smell for me was the extraction plant at Glaxo Cambois,it was a horrible smell quite sickly. I remember my first job was there when I left school my clothes used to reak of the place I think it was an amine but on a windy day it could be smelt over Bedlington. Don't know if health & safety would allow it now after leaving there went to the navy,but will never forget the smell ugh ..