Thanx guys.
I think the time I shot that was 1am Ving....I had to wait until the seeing got better. (seems to be the way it is here lately, the seeing will be 2-4/10 until 1am then it will suddenly 'come good' for a few hours)..The sky looks bright 'cos I played with the blue channel to bring out some more surface details, which sometimes works, sometimes not.
BTW when I say it 'comes good' I mean it might jump a whole 1-2 points
YAY!