The BP Chemical works at Salt End ( optical illusion ).
This just begged to be processed in hdr.
There's an optical illusion going on here.. the two central chimneys look as though they go to ground and in front at their base is a big see through screen. What you are actually seeing is three separate blue buildings, the gaps between the buildings just happened to look the same width as the chimneys and line up perfectly with the chimneys behind. I believe the buildings have fans on top and they are venting out that white cloud :-)