Thank you for your valued opinion, very much appreciated.
At the % quoted I think that this is a vast improvement just taking on board your sage advice. 100%, I think, would only be possible where there was no movement involved allowing a free choice of apertures and shutter speeds with either no skies or no dark shadows.
I have reduced the contrast to it's lowest setting (-2) and on my shoot this morning I put in an ND2 filter to remove the blown highlights and then I changed this to ND4. The problem was the darks were too dark by this process and required a lot of tweaking in post processing. Ideally, I would like to narrow the range, less at each end of the tonal spectrum. The bits and pieces at the side of the track and the highlights on the trains were a problem as was the headlight on every train. I think it would have been best if I was in a large field where I could avoid the sky and shoot a stationary train with more choices of speed.
Does your expensive camera allow you to adjust any of these parameters?
By the way the drivers windows were actually very dark being of the smoked glass variety. Dark windows, headlights, shiny reflections on the carriage bodies, light catching rails and lineside clutter with sky and dark railside shadows was never going to be easy!