Working with film negatives

I have been searching through my old film negatives and been scanning images that I took on my numerous wanderings around the city of Plymouth in the late 1980's, early 1990's.  This was a time where I would just grab my camera and photograph what caught my eye.  The image above is part of the railway bridge at Camel's Head - original image is in colour but this is a quadtone I made in Photoshop as part of my experimentation into B/W imaging for printing.  I really like the overall look to the image and using a red filter as part of the conversion to B/W in Photoshop helped to bring out the cloud formations in the sky although the contrast between the highlights and shadows are a little more extreme than they needed to be but then again, the lighting was pretty contrasty in the original too.

Edit: On further examining of techniques for converting colour images to B/W I will be returning to this photograph and making some changes to improve the contrast and overall look.  The photo posted here is good but it could be better.