Andy, I tried it and (I accept that I am not objective here) I don't think it improves the image, I actually think that it takes something away.
As I said, perspective is something that we see. It gives us a perception of scale, depth and height. Take it away, and the image flattens. In fact, straightening the engine houses starts to create an optical illusion that they are leaning away from each other, fully contrary to our perception of what the visual perspective should be.
I think that we can run the risk of getting a bit fundamentalist on some of these things. I look at some of the images created or captured by the great and the good amongst photographers of old, and you find loads grain, an abundance of halos, black, featureless shadows, burned out highlights, white skies, shamelessly obvious perspective 'aberrations' and all sorts of things that seem now to be considered to be faults, sometimes I suspect to the detriment of what becomes the final, overmanipulated photograph.
If I sound stroppy, I certainly don't mean to, because I have benefitted enormously from the feedback on this thread. However, as I said earlier, forgive me, but I am going to leave it as it is on this particular matter.
