This is Bentham beach in southern Devon.  I took this a few weeks ago when I was in the area.  This was taken about 30 minutes after the sun had dropped below the horizon.  I should probably remove the light sources on the island and cliff top to make the image a little cleaner.  The cloud and colour of the sky reminds me more of a tropical sunset than the UK.  Could be due to the hint of magenta in the heavens.  Well worth a visit if you can find it.