I found this little stream earlier today and decided that I'd return there should the evening light look likely to be reasonable. I was drawn to it by the scattered flints and its smooth surface and shallow depth. I had to use a 0.9 and 0.3 soft ND grad aligned at an angle along the upper edge of the foreground flints in order to reduce the brightness of the reflections. I used an 81B warm up filter to help bring out the sunset's reflected colour.