Evil Henchmen's Lair?

I've often looked across the industrial estate at this building, and wondered what all the Oompah Loompas do in there, late at night, to cause so much smoke to billow from the chimneys when the rest of the estate has gone to sleep.

I got some funny looks as I was taking this, because I climbed back up the fire escape onto the third floor to try and cut out all the uninteresting foreground. I'm not sure it's worked as well as I would have liked - I tend to see things which I think would photograph well, and somehow it just doesn't quite work the way I thought it would! Maybe a wider shot next time...