The ND8 graduated neutral density filter happened to be on the camera so my first few shots (of which this is one) were modified by that. However, apart from it darkening of the upper sky, possibly emphasising the blues a touch and giving more faithful delineation of the cloud, the image is what came out of the camera and involves no post processing. I don't recall seeing a better sunset than this one for a couple of decades, if at all. The people in some neighbouring flats were equally impressed because they too were out on their balconies with cameras. I took some photographs without the filter too, but this one, with the foregound interest of the passing boat, is the one I like best.
For an idea of what this section of the Thames from this vantage point looks like during the day see here and here.
photograph and text (c) T. Boughen
Camera: Canon
Mode: Aperture Priority
Focal Length: 45mm
F No: f7.1
Shutter Speed: 1/50
ISO: 800
Exposure Compensation: -0.67 EV
Image Stabilisation: O
Filter: Graduated ND8