In response to drmike and I hope that it is not too boring. Nikon D810, Tamron 24-70 @26mm, f8, 3 secs, Hoya ND100 filter +polarizer. In lightroom default scenic sharpening, WB as shot / auto WB in camaera, lens corrections applied plus a tiny vignette. All sliders untouched apart from HSL saturation +35 yellow +46 orange luminance -2 Orange +43 yellow. The scene was in complete shade and very flat. I wanted to lift it to make it look as though a bit of watery sunshine had lit the scene. Altering the WB would probably have done much the same. I then applied a radial filter to the centre of the image, see attachment for settings and then applied my sky graduated filter see other attachment for settings. I opened this as a smart object in ps masked the 2 figures out, one was very blurred or I may have kept them in, into Viveza slight S applied to increase contrast plus 18% structure this lifts the entire image. So the image does not show what was really there but so what my only regret was removing the 2 figures as it means that I can not enter it into the landscape photographer of the year competition not that it would get anywhere. All in all I took 83 images in approx 2 hours on a tiny stretch of river probably no longer than 500metres. Unfortunately, for me, their were hundreds of people enjoying the place including a bunch of teenagers jumping into the river and sunbathing on the rocks which meant that many falls couldn't be shot but the countryside is for everyone. Stangely for such a well photographed spot I saw only one other tripod.
Ken