Thanks for the comments.
Forgot to mention I'm aware of dust bunnies. Sensor was extremely dirty that day. On lighter shots there are 10+ big ones.
I can't remember if I used a polariser or not actually. I think not.
Sky was brought out by a curve (as a consequence of getting the sand how I wanted it).
To give some idea, here is the original:
How about this version:
Or, just slightly more punchy:
