Thanks for your comment Bill. No need to say "sorry" as I am sure your comment was meant to help rather than hurt.
"Pretty"? Maybe, "beautiful"? Yes, that is what I wanted to convey. Also "majestic" (in which task I obviously failed!). I suspect that I should have de-saturated the colours a little bit but then I was going to lose the sky.
Any ideas on reducing the noise would be appreciated - obviously you are seeing some introduced noise from the jpeg conversion but, yes, the original suffers from a similar problem. Also sharpness, I did use a tripod and mirror lockup and cable shutter release but still the sharpness isn't there. There was a wind that night but I had thought the weight of the lens (approx. 2kg) would have prevented that having an effect.
In case it helps, the shot details are: EOS 400D body, ISO 100, 30s exposure, F22, 266mm focal length (using the Sigma 50-500mm zoom). I went F22 to try to ensure sharpness even if the focus in some parts was slightly off (I firgured this was going to be a long exposure no matter what!)